Add reference assemblies and runtime targets support to dependency context builder.

src/Microsoft.DotNet.ProjectModel/Compilation/LibraryExport.cs

@@ -49,6 +49,16 @@ namespace Microsoft.DotNet.ProjectModel.Compilation
         /// </summary>
         public IEnumerable<AnalyzerReference> AnalyzerReferences { get; }
 
+        /// <summary>
+        /// Get a list of runtime targets provided by this export.
+        /// </summary>
+        public IEnumerable<LibraryRuntimeTarget> RuntimeTargets { get; }
+
+        /// <summary>
+        /// Get a list of resource assemblies provided by this export.
+        /// </summary>
+        public IEnumerable<LibraryResourceAssembly> ResourceAssemblies { get; }
+
         public LibraryExport(LibraryDescription library,
                              IEnumerable<LibraryAsset> compileAssemblies,
                              IEnumerable<LibraryAsset> sourceReferences,
@@ -56,7 +66,9 @@ namespace Microsoft.DotNet.ProjectModel.Compilation
                              IEnumerable<LibraryAsset> runtimeAssets,
                              IEnumerable<LibraryAsset> nativeLibraries,
                              IEnumerable<LibraryAsset> embeddedResources,
-                             IEnumerable<AnalyzerReference> analyzers)
+                             IEnumerable<AnalyzerReference> analyzers,
+                             IEnumerable<LibraryRuntimeTarget> runtimeTargets,
+                             IEnumerable<LibraryResourceAssembly> resourceAssemblies)
         {
             Library = library;
             CompilationAssemblies = compileAssemblies;
@@ -66,6 +78,8 @@ namespace Microsoft.DotNet.ProjectModel.Compilation
             NativeLibraries = nativeLibraries;
             EmbeddedResources = embeddedResources;
             AnalyzerReferences = analyzers;
+            RuntimeTargets = runtimeTargets;
+            ResourceAssemblies = resourceAssemblies;
         }
 
         private string DebuggerDisplay => Library.Identity.ToString();

src/Microsoft.DotNet.ProjectModel/Compilation/LibraryExportBuilder.cs

@@ -26,6 +26,10 @@ namespace Microsoft.DotNet.ProjectModel.Compilation
 
         private IList<AnalyzerReference> _analyzerReferences;
 
+        private IList<LibraryRuntimeTarget> _runtimeTargets;
+
+        private IList<LibraryResourceAssembly> _resourceAssemblies;
+
         public LibraryDescription Library { get; set; }
 
         public IEnumerable<LibraryAsset> RuntimeAssemblies => _runtimeAssemblies;
@@ -44,6 +48,10 @@ namespace Microsoft.DotNet.ProjectModel.Compilation
 
         public IEnumerable<AnalyzerReference> AnalyzerReferences => _analyzerReferences;
 
+        public IEnumerable<LibraryRuntimeTarget> RuntimeTargets => _runtimeTargets;
+
+        public IEnumerable<LibraryResourceAssembly> ResourceAssemblies => _resourceAssemblies;
+
         public static LibraryExportBuilder Create(LibraryDescription library = null)
         {
             return new LibraryExportBuilder().WithLibrary(library);
@@ -63,7 +71,9 @@ namespace Microsoft.DotNet.ProjectModel.Compilation
                 RuntimeAssets ?? EmptyArray<LibraryAsset>.Value,
                 NativeLibraries ?? EmptyArray<LibraryAsset>.Value,
                 EmbeddedResources ?? EmptyArray<LibraryAsset>.Value,
-                AnalyzerReferences ?? EmptyArray<AnalyzerReference>.Value);
+                AnalyzerReferences ?? EmptyArray<AnalyzerReference>.Value,
+                RuntimeTargets ?? EmptyArray<LibraryRuntimeTarget>.Value,
+                ResourceAssemblies ?? EmptyArray<LibraryResourceAssembly>.Value);
         }
 
         public LibraryExportBuilder WithLibrary(LibraryDescription libraryDescription)
@@ -89,7 +99,7 @@ namespace Microsoft.DotNet.ProjectModel.Compilation
             Replace(ref _compilationAssemblies, assets);
             return this;
         }
-        
+
         public LibraryExportBuilder WithSourceReferences(IEnumerable<LibraryAsset> assets)
         {
             Replace(ref _sourceReferences, assets);
@@ -114,6 +124,18 @@ namespace Microsoft.DotNet.ProjectModel.Compilation
             return this;
         }
 
+        public LibraryExportBuilder WithRuntimeTargets(IEnumerable<LibraryRuntimeTarget> targets)
+        {
+            Replace(ref _runtimeTargets, targets);
+            return this;
+        }
+
+        public LibraryExportBuilder WithResourceAssemblies(IEnumerable<LibraryResourceAssembly> assemblies)
+        {
+            Replace(ref _resourceAssemblies, assemblies);
+            return this;
+        }
+
         public LibraryExportBuilder AddRuntimeAssembly(LibraryAsset asset)
         {
             Add(ref _runtimeAssemblies, asset);
@@ -156,9 +178,28 @@ namespace Microsoft.DotNet.ProjectModel.Compilation
             return this;
         }
 
+        public LibraryExportBuilder AddRuntimeTarget(LibraryRuntimeTarget target)
+        {
+            Add(ref _runtimeTargets, target);
+            return this;
+        }
+
+        public LibraryExportBuilder AddResourceAssembly(LibraryResourceAssembly assembly)
+        {
+            Add(ref _resourceAssemblies, assembly);
+            return this;
+        }
+
         private void Replace<T>(ref IList<T> list, IEnumerable<T> enumerable)
         {
-            list = new List<T>(enumerable);
+            if (enumerable == null)
+            {
+                list = null;
+            }
+            else
+            {
+                list = new List<T>(enumerable);
+            }
         }
 
         private void Add<T>(ref IList<T> list, T item)

src/Microsoft.DotNet.ProjectModel/Compilation/LibraryExporter.cs

@@ -122,6 +122,8 @@ namespace Microsoft.DotNet.ProjectModel.Compilation
                     .WithNativeLibraries(libraryExport.NativeLibraries)
                     .WithEmbedddedResources(libraryExport.EmbeddedResources)
                     .WithAnalyzerReference(analyzerReferences)
+                    .WithResourceAssemblies(libraryExport.ResourceAssemblies)
+                    .WithRuntimeTargets(libraryExport.RuntimeTargets)
                     .Build();
             }
         }
@@ -199,6 +201,28 @@ namespace Microsoft.DotNet.ProjectModel.Compilation
                     }
                 }
             }
+            if (package.RuntimeTargets.Any())
+            {
+                foreach (var targetGroup in package.RuntimeTargets.GroupBy(t => t.Runtime))
+                {
+                    var runtime = new List<LibraryAsset>();
+                    var native = new List<LibraryAsset>();
+
+                    foreach (var lockFileRuntimeTarget in targetGroup)
+                    {
+                        if (string.Equals(lockFileRuntimeTarget.AssetType, "native", StringComparison.OrdinalIgnoreCase))
+                        {
+                            native.Add(LibraryAsset.CreateFromRelativePath(package.Path, lockFileRuntimeTarget.Path));
+                        }
+                        else if (string.Equals(lockFileRuntimeTarget.AssetType, "runtime", StringComparison.OrdinalIgnoreCase))
+                        {
+                            runtime.Add(LibraryAsset.CreateFromRelativePath(package.Path, lockFileRuntimeTarget.Path));
+                        }
+                    }
+
+                    builder.AddRuntimeTarget(new LibraryRuntimeTarget(targetGroup.Key, runtime, native));
+                }
+            }
 
             return builder.Build();
         }

src/Microsoft.DotNet.ProjectModel/Compilation/LibraryResourceAssembly.cs

@@ -0,0 +1,18 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+namespace Microsoft.DotNet.ProjectModel.Compilation
+{
+    public class LibraryResourceAssembly
+    {
+        public LibraryResourceAssembly(LibraryAsset asset, string locale)
+        {
+            Asset = asset;
+            Locale = locale;
+        }
+
+        public LibraryAsset Asset { get; }
+
+        public string Locale { get; }
+    }
+}

src/Microsoft.DotNet.ProjectModel/Compilation/LibraryRuntimeTarget.cs

@@ -0,0 +1,32 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using System.Linq;
+using System.Collections.Generic;
+
+namespace Microsoft.DotNet.ProjectModel.Compilation
+{
+    public class LibraryRuntimeTarget
+    {
+        public LibraryRuntimeTarget(string runtime,
+            IEnumerable<LibraryAsset> runtimeAssemblies,
+            IEnumerable<LibraryAsset> nativeLibraries)
+        {
+            Runtime = runtime;
+            RuntimeAssemblies = runtimeAssemblies.ToArray();
+            NativeLibraries = nativeLibraries.ToArray();
+        }
+
+        public string Runtime { get; }
+
+        /// <summary>
+        /// Gets a list of fully-qualified paths to MSIL binaries required to run
+        /// </summary>
+        public IReadOnlyList<LibraryAsset> RuntimeAssemblies { get; }
+
+        /// <summary>
+        /// Gets a list of fully-qualified paths to native binaries required to run
+        /// </summary>
+        public IReadOnlyList<LibraryAsset> NativeLibraries { get; }
+    }
+}

src/Microsoft.DotNet.ProjectModel/DependencyContextBuilder.cs

@@ -49,8 +49,8 @@ namespace Microsoft.Extensions.DependencyModel
                 runtime,
                 false,
                 GetCompilationOptions(compilerOptions),
-                GetLibraries(compilationExports, dependencyLookup, runtime: false).Cast<CompilationLibrary>().ToArray(),
-                GetLibraries(runtimeExports, dependencyLookup, runtime: true).Cast<RuntimeLibrary>().ToArray(),
+                GetLibraries(compilationExports, dependencyLookup, runtime: false).Cast<CompilationLibrary>(),
+                GetLibraries(runtimeExports, dependencyLookup, runtime: true).Cast<RuntimeLibrary>(),
                 new KeyValuePair<string, string[]>[0]);
         }
 
@@ -107,14 +107,14 @@ namespace Microsoft.Extensions.DependencyModel
                 }
             }
 
-            string[] assemblies;
+            IEnumerable<string> assemblies;
             if (type == LibraryType.ReferenceAssembly)
             {
                 assemblies = ResolveReferenceAssembliesPath(libraryAssets);
             }
             else
             {
-                assemblies = libraryAssets.Select(libraryAsset => libraryAsset.RelativePath).ToArray();
+                assemblies = libraryAssets.Select(libraryAsset => libraryAsset.RelativePath);
             }
 
             if (runtime)
@@ -124,9 +124,10 @@ namespace Microsoft.Extensions.DependencyModel
                     export.Library.Identity.Name,
                     export.Library.Identity.Version.ToString(),
                     export.Library.Hash,
-                    assemblies.Select(RuntimeAssembly.Create).ToArray(),
-                    new RuntimeTarget[0],
-                    libraryDependencies.ToArray(),
+                    assemblies.Select(RuntimeAssembly.Create),
+                    export.ResourceAssemblies.Select(CreateResourceAssembly),
+                    export.RuntimeTargets.Select(CreateRuntimeTarget),
+                    libraryDependencies,
                     serviceable
                     );
             }
@@ -138,15 +139,31 @@ namespace Microsoft.Extensions.DependencyModel
                     export.Library.Identity.Version.ToString(),
                     export.Library.Hash,
                     assemblies,
-                    libraryDependencies.ToArray(),
+                    libraryDependencies,
                     serviceable
                    );
             }
         }
 
-        private string[] ResolveReferenceAssembliesPath(IEnumerable<LibraryAsset> libraryAssets)
+        private ResourceAssembly CreateResourceAssembly(LibraryResourceAssembly resourceAssembly)
+        {
+            return new ResourceAssembly(
+                path: resourceAssembly.Asset.RelativePath,
+                locale: resourceAssembly.Locale
+                );
+        }
+
+        private RuntimeTarget CreateRuntimeTarget(LibraryRuntimeTarget runtimeTarget)
+        {
+            return new RuntimeTarget(
+                runtime: runtimeTarget.Runtime,
+                assemblies: runtimeTarget.RuntimeAssemblies.Select(a => RuntimeAssembly.Create(a.RelativePath)),
+                nativeLibraries: runtimeTarget.NativeLibraries.Select(l => l.RelativePath)
+                );
+        }
+
+        private IEnumerable<string> ResolveReferenceAssembliesPath(IEnumerable<LibraryAsset> libraryAssets)
         {
-            var resolvedPaths = new List<string>();
             var referenceAssembliesPath =
                 PathUtility.EnsureTrailingSlash(_referenceAssembliesPath);
             foreach (var libraryAsset in libraryAssets)
@@ -155,14 +172,13 @@ namespace Microsoft.Extensions.DependencyModel
                 // if not, save only assembly name and try to find it somehow later
                 if (libraryAsset.ResolvedPath.StartsWith(referenceAssembliesPath))
                 {
-                    resolvedPaths.Add(libraryAsset.ResolvedPath.Substring(referenceAssembliesPath.Length));
+                    yield return libraryAsset.ResolvedPath.Substring(referenceAssembliesPath.Length);
                 }
                 else
                 {
-                    resolvedPaths.Add(Path.GetFileName(libraryAsset.ResolvedPath));
+                    yield return Path.GetFileName(libraryAsset.ResolvedPath);
                 }
             }
-            return resolvedPaths.ToArray();
         }
     }
 }

src/Microsoft.DotNet.ProjectModel/Graph/LockFileReader.cs

@@ -170,6 +170,21 @@ namespace Microsoft.DotNet.ProjectModel.Graph
             return library;
         }
 
+        private static LockFileRuntimeTarget ReadRuntimeTarget(string property, JsonValue json)
+        {
+            var jsonObject = json as JsonObject;
+            if (jsonObject == null)
+            {
+                throw FileFormatException.Create("The value type is not an object.", json);
+            }
+
+            return new LockFileRuntimeTarget(
+                path: property,
+                runtime: jsonObject.ValueAsString("runtime"),
+                assetType: jsonObject.ValueAsString("assetType")
+                );
+        }
+
         private static LockFileContentFile ReadContentFile(string property, JsonValue json)
         {
             var contentFile = new LockFileContentFile()

src/Microsoft.DotNet.ProjectModel/Graph/LockFileRuntimeTarget.cs

@@ -0,0 +1,21 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+namespace Microsoft.DotNet.ProjectModel.Graph
+{
+    public class LockFileRuntimeTarget
+    {
+        public LockFileRuntimeTarget(string path, string runtime, string assetType)
+        {
+            Path = path;
+            Runtime = runtime;
+            AssetType = assetType;
+        }
+
+        public string Path { get; }
+
+        public string Runtime { get; }
+
+        public string AssetType { get; }
+    }
+}

src/Microsoft.DotNet.ProjectModel/Graph/LockFileTargetLibrary.cs

@@ -32,5 +32,7 @@ namespace Microsoft.DotNet.ProjectModel.Graph
         public IList<LockFileItem> NativeLibraries { get; set; } = new List<LockFileItem>();
 
         public IList<LockFileContentFile> ContentFiles { get; set; } = new List<LockFileContentFile>();
+
+        public IList<LockFileRuntimeTarget> RuntimeTargets { get; set; } = new List<LockFileRuntimeTarget>();
     }
 }

src/Microsoft.DotNet.ProjectModel/PackageDescription.cs

@@ -32,7 +32,7 @@ namespace Microsoft.DotNet.ProjectModel
         }
 
         private LockFileTargetLibrary Target { get; }
-        
+
         public LockFilePackageLibrary Library { get; }
 
         public IEnumerable<LockFileItem> RuntimeAssemblies => FilterPlaceholders(Target.RuntimeAssemblies);
@@ -45,6 +45,8 @@ namespace Microsoft.DotNet.ProjectModel
 
         public IEnumerable<LockFileContentFile> ContentFiles => Target.ContentFiles;
 
+        public IEnumerable<LockFileRuntimeTarget> RuntimeTargets => Target.RuntimeTargets;
+
         private IEnumerable<LockFileItem> FilterPlaceholders(IList<LockFileItem> items)
         {
             return items.Where(a => !PackageDependencyProvider.IsPlaceholderFile(a));

src/Microsoft.Extensions.DependencyModel/CompilationLibrary.cs

@@ -3,16 +3,23 @@
 
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using Microsoft.Extensions.DependencyModel.Resolution;
 
 namespace Microsoft.Extensions.DependencyModel
 {
     public class CompilationLibrary : Library
     {
-        public CompilationLibrary(string type, string name, string version, string hash, string[] assemblies, Dependency[] dependencies, bool serviceable)
+        public CompilationLibrary(string type,
+            string name,
+            string version,
+            string hash,
+            IEnumerable<string> assemblies,
+            IEnumerable<Dependency> dependencies,
+            bool serviceable)
             : base(type, name, version, hash,  dependencies, serviceable)
         {
-            Assemblies = assemblies;
+            Assemblies = assemblies.ToArray();
         }
 
         public IReadOnlyList<string> Assemblies { get; }

src/Microsoft.Extensions.DependencyModel/DependencyContextCsvReader.cs

@@ -46,9 +46,10 @@ namespace Microsoft.Extensions.DependencyModel
                     name: identity.Item2,
                     version: identity.Item3,
                     hash: identity.Item4,
-                    assemblies: packageGroup.Select(l => RuntimeAssembly.Create(l.AssetPath)).ToArray(),
-                    subTargets: new RuntimeTarget[0],
-                    dependencies: new Dependency[] { },
+                    assemblies: packageGroup.Select(l => RuntimeAssembly.Create(l.AssetPath)),
+                    resourceAssemblies: Enumerable.Empty<ResourceAssembly>(),
+                    subTargets: Enumerable.Empty<RuntimeTarget>(),
+                    dependencies: Enumerable.Empty<Dependency>(),
                     serviceable: false
                     ));
             }
@@ -58,9 +59,9 @@ namespace Microsoft.Extensions.DependencyModel
                 runtime: string.Empty,
                 isPortable: false,
                 compilationOptions: CompilationOptions.Default,
-                compileLibraries: new CompilationLibrary[] {},
+                compileLibraries: Enumerable.Empty<CompilationLibrary>(),
                 runtimeLibraries: runtimeLibraries.ToArray(),
-                runtimeGraph: new KeyValuePair<string, string[]>[0]);
+                runtimeGraph: Enumerable.Empty<KeyValuePair<string, string[]>>());
         }
 
         private Tuple<string, string, string, string> PackageIdentity(DepsFileLine line)

src/Microsoft.Extensions.DependencyModel/DependencyContextJsonReader.cs

@@ -173,7 +173,18 @@ namespace Microsoft.Extensions.DependencyModel
                     .Select(RuntimeAssembly.Create)
                     .ToArray();
 
-                return new RuntimeLibrary(stub.Type, name, version, stub.Hash, assemblies, runtimeTargets.ToArray(), dependencies, stub.Serviceable);
+                var resourceAssemblies = ReadResourceAssemblies((JObject)libraryObject[DependencyContextStrings.ResourceAssembliesPropertyName]);
+
+                return new RuntimeLibrary(
+                    type: stub.Type,
+                    name: name,
+                    version: version,
+                    hash: stub.Hash,
+                    assemblies: assemblies,
+                    resourceAssemblies: resourceAssemblies,
+                    subTargets: runtimeTargets.ToArray(),
+                    dependencies: dependencies,
+                    serviceable: stub.Serviceable);
             }
             else
             {
@@ -182,6 +193,21 @@ namespace Microsoft.Extensions.DependencyModel
             }
         }
 
+        private IEnumerable<ResourceAssembly> ReadResourceAssemblies(JObject resourcesObject)
+        {
+            if (resourcesObject == null)
+            {
+                yield break;
+            }
+            foreach (var resourceProperty in resourcesObject)
+            {
+                yield return new ResourceAssembly(
+                    locale: resourceProperty.Value[DependencyContextStrings.LocalePropertyName]?.Value<string>(),
+                    path: resourceProperty.Key
+                    );
+            }
+        }
+
         private static IEnumerable<RuntimeTargetEntryStub> ReadRuntimeTargetEntries(JObject runtimeTargetObject)
         {
             if (runtimeTargetObject == null)

src/Microsoft.Extensions.DependencyModel/DependencyContextStrings.cs

@@ -66,5 +66,9 @@ namespace Microsoft.Extensions.DependencyModel
         internal const string RuntimeAssetType = "runtime";
 
         internal const string NativeAssetType = "native";
+
+        internal const string ResourceAssembliesPropertyName = "resources";
+
+        internal const string LocalePropertyName = "locale";
     }
 }

src/Microsoft.Extensions.DependencyModel/DependencyContextWriter.cs

@@ -140,49 +140,70 @@ namespace Microsoft.Extensions.DependencyModel
             return targetObject;
         }
 
+        private void AddCompilationAssemblies(JObject libraryObject, IEnumerable<string> compilationAssemblies)
+        {
+            libraryObject.Add(new JProperty(DependencyContextStrings.CompileTimeAssembliesKey,
+                 WriteAssemblies(compilationAssemblies))
+             );
+        }
+
+        private void AddRuntimeAssemblies(JObject libraryObject, IEnumerable<RuntimeAssembly> runtimeAssemblies)
+        {
+            libraryObject.Add(new JProperty(DependencyContextStrings.RuntimeAssembliesKey,
+                       WriteAssemblies(runtimeAssemblies.Select(a => a.Path)))
+                   );
+        }
+
+        private void AddDependencies(JObject libraryObject, IEnumerable<Dependency> dependencies)
+        {
+            libraryObject.Add(
+                new JProperty(DependencyContextStrings.DependenciesPropertyName,
+                new JObject(
+                    dependencies.Select(dependency => new JProperty(dependency.Name, dependency.Version))))
+                    );
+        }
+
+        private void AddResourceAssemblies(JObject libraryObject, IEnumerable<ResourceAssembly> resourceAssemblies)
+        {
+            libraryObject.Add(DependencyContextStrings.ResourceAssembliesPropertyName,
+                new JObject(resourceAssemblies.Select(a =>
+                    new JProperty(a.Path, new JObject(new JProperty(DependencyContextStrings.LocalePropertyName, a.Locale))))
+                    )
+                );
+        }
+
         private JObject WriteTargetLibrary(Library library)
         {
-            string propertyName;
-            string[] assemblies;
-
             var runtimeLibrary = library as RuntimeLibrary;
             if (runtimeLibrary != null)
             {
-                propertyName = DependencyContextStrings.RuntimeAssembliesKey;
-                assemblies = runtimeLibrary.Assemblies.Select(assembly => assembly.Path).ToArray();
+                var libraryObject = new JObject();
+                AddDependencies(libraryObject, runtimeLibrary.Dependencies);
+                AddRuntimeAssemblies(libraryObject, runtimeLibrary.Assemblies);
+                AddResourceAssemblies(libraryObject, runtimeLibrary.ResourceAssemblies);
+                return libraryObject;
             }
-            else
+
+            var compilationLibrary = library as CompilationLibrary;
+            if (compilationLibrary != null)
             {
-                var compilationLibrary = library as CompilationLibrary;
-                if (compilationLibrary != null)
-                {
-                    propertyName = DependencyContextStrings.CompileTimeAssembliesKey;
-                    assemblies = compilationLibrary.Assemblies.ToArray();
-                }
-                else
-                {
-                    throw new NotSupportedException();
-                }
+                var libraryObject = new JObject();
+                AddDependencies(libraryObject, compilationLibrary.Dependencies);
+                AddCompilationAssemblies(libraryObject, compilationLibrary.Assemblies);
+                return libraryObject;
             }
-
-
-            return new JObject(
-                new JProperty(DependencyContextStrings.DependenciesPropertyName, WriteDependencies(library.Dependencies)),
-                new JProperty(propertyName,
-                    WriteAssemblies(assemblies))
-                );
+            throw new NotSupportedException();
         }
 
         private JObject WritePortableTargetLibrary(RuntimeLibrary runtimeLibrary, CompilationLibrary compilationLibrary)
         {
-            var libraryObject = new JObject();
-            var dependencies = new HashSet<Dependency>();
 
+            var libraryObject = new JObject();
+
+            var dependencies = new HashSet<Dependency>();
             if (runtimeLibrary != null)
             {
-                libraryObject.Add(new JProperty(DependencyContextStrings.RuntimeAssembliesKey,
-                    WriteAssemblies(runtimeLibrary.Assemblies.Select(a => a.Path)))
-                );
+
                 if (runtimeLibrary.RuntimeTargets.Any())
                 {
                     libraryObject.Add(new JProperty(
@@ -190,21 +211,20 @@ namespace Microsoft.Extensions.DependencyModel
                         new JObject(runtimeLibrary.RuntimeTargets.SelectMany(WriteRuntimeTarget)))
                         );
                 }
+                AddResourceAssemblies(libraryObject, runtimeLibrary.ResourceAssemblies);
+                AddRuntimeAssemblies(libraryObject, runtimeLibrary.Assemblies);
 
                 dependencies.UnionWith(runtimeLibrary.Dependencies);
             }
 
             if (compilationLibrary != null)
             {
-                libraryObject.Add(new JProperty(DependencyContextStrings.CompileTimeAssembliesKey,
-                    WriteAssemblies(compilationLibrary.Assemblies))
-                );
+                AddCompilationAssemblies(libraryObject, compilationLibrary.Assemblies);
+
                 dependencies.UnionWith(compilationLibrary.Dependencies);
             }
 
-            libraryObject.Add(
-                new JProperty(DependencyContextStrings.DependenciesPropertyName, WriteDependencies(dependencies)));
-
+            AddDependencies(libraryObject, dependencies);
             return libraryObject;
         }
 
@@ -241,13 +261,6 @@ namespace Microsoft.Extensions.DependencyModel
             return new JObject(assemblies.Select(assembly => new JProperty(assembly, new JObject())));
         }
 
-        private JObject WriteDependencies(IEnumerable<Dependency> dependencies)
-        {
-            return new JObject(
-                dependencies.Select(dependency => new JProperty(dependency.Name, dependency.Version))
-                );
-        }
-
         private JObject WriteLibraries(DependencyContext context)
         {
             var allLibraries =

src/Microsoft.Extensions.DependencyModel/Library.cs

@@ -1,19 +1,20 @@
 // Copyright (c) .NET Foundation and contributors. All rights reserved.
 // Licensed under the MIT license. See LICENSE file in the project root for full license information.
 
+using System.Linq;
 using System.Collections.Generic;
 
 namespace Microsoft.Extensions.DependencyModel
 {
     public class Library
     {
-        public Library(string type, string name, string version, string hash, Dependency[] dependencies, bool serviceable)
+        public Library(string type, string name, string version, string hash, IEnumerable<Dependency> dependencies, bool serviceable)
         {
             Type = type;
             Name = name;
             Version = version;
             Hash = hash;
-            Dependencies = dependencies;
+            Dependencies = dependencies.ToArray();
             Serviceable = serviceable;
         }
 

src/Microsoft.Extensions.DependencyModel/ResourceAssembly.cs

@@ -0,0 +1,19 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+namespace Microsoft.Extensions.DependencyModel
+{
+    public class ResourceAssembly
+    {
+        public ResourceAssembly(string path, string locale)
+        {
+            Locale = locale;
+            Path = path;
+        }
+
+        public string Locale { get; set; }
+
+        public string Path { get; set; }
+
+    }
+}

src/Microsoft.Extensions.DependencyModel/RuntimeLibrary.cs

@@ -13,18 +13,22 @@ namespace Microsoft.Extensions.DependencyModel
             string name,
             string version,
             string hash,
-            RuntimeAssembly[] assemblies,
-            RuntimeTarget[] subTargets,
-            Dependency[] dependencies,
+            IEnumerable<RuntimeAssembly> assemblies,
+            IEnumerable<ResourceAssembly> resourceAssemblies,
+            IEnumerable<RuntimeTarget> subTargets,
+            IEnumerable<Dependency> dependencies,
             bool serviceable)
             : base(type, name, version, hash, dependencies, serviceable)
         {
-            Assemblies = assemblies;
-            RuntimeTargets = subTargets;
+            Assemblies = assemblies.ToArray();
+            ResourceAssemblies = resourceAssemblies.ToArray();
+            RuntimeTargets = subTargets.ToArray();
         }
 
         public IReadOnlyList<RuntimeAssembly> Assemblies { get; }
 
+        public IReadOnlyList<ResourceAssembly> ResourceAssemblies { get; }
+
         public IReadOnlyList<RuntimeTarget> RuntimeTargets { get; }
     }
 }

src/Microsoft.Extensions.DependencyModel/RuntimeTarget.cs

@@ -1,14 +1,15 @@
 using System.Collections.Generic;
+using System.Linq;
 
 namespace Microsoft.Extensions.DependencyModel
 {
     public class RuntimeTarget
     {
-        public RuntimeTarget(string runtime, IReadOnlyList<RuntimeAssembly> assemblies, IReadOnlyList<string> nativeLibraries)
+        public RuntimeTarget(string runtime, IEnumerable<RuntimeAssembly> assemblies, IEnumerable<string> nativeLibraries)
         {
             Runtime = runtime;
-            Assemblies = assemblies;
-            NativeLibraries = nativeLibraries;
+            Assemblies = assemblies.ToArray();
+            NativeLibraries = nativeLibraries.ToArray();
         }
 
         public string Runtime { get; }

test/Microsoft.DotNet.ProjectModel.Tests/LibraryExporterPackageTests.cs

@@ -1,3 +1,6 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
 using System;
 using System.Collections.Generic;
 using System.IO;
@@ -15,36 +18,6 @@ namespace Microsoft.DotNet.ProjectModel.Tests
     {
         private const string PackagePath = "PackagePath";
 
-        private LibraryExport ExportSingle(LibraryDescription description = null)
-        {
-            var rootProject = new Project()
-            {
-                Name = "RootProject",
-                CompilerName = "csc"
-            };
-
-            var rootProjectDescription = new ProjectDescription(
-                new LibraryRange(),
-                rootProject,
-                new LibraryRange[] { },
-                new TargetFrameworkInformation(),
-                true);
-
-            if (description == null)
-            {
-                description = rootProjectDescription;
-            }
-            else
-            {
-                description.Parents.Add(rootProjectDescription);
-            }
-
-            var libraryManager = new LibraryManager(new[] { description }, new DiagnosticMessage[] { }, "");
-            var allExports = new LibraryExporter(rootProjectDescription, libraryManager, "config", "runtime", "basepath", "solutionroot").GetAllExports();
-            var export = allExports.Single();
-            return export;
-        }
-
         private PackageDescription CreateDescription(LockFileTargetLibrary target = null, LockFilePackageLibrary package = null)
         {
             return new PackageDescription(PackagePath,
@@ -54,7 +27,7 @@ namespace Microsoft.DotNet.ProjectModel.Tests
         }
 
         [Fact]
-        private void ExportsPackageNativeLibraries()
+        public void ExportsPackageNativeLibraries()
         {
             var description = CreateDescription(
                 new LockFileTargetLibrary()
@@ -76,7 +49,7 @@ namespace Microsoft.DotNet.ProjectModel.Tests
         }
 
         [Fact]
-        private void ExportsPackageCompilationAssebmlies()
+        public void ExportsPackageCompilationAssebmlies()
         {
             var description = CreateDescription(
                 new LockFileTargetLibrary()
@@ -98,7 +71,7 @@ namespace Microsoft.DotNet.ProjectModel.Tests
         }
 
         [Fact]
-        private void ExportsPackageRuntimeAssebmlies()
+        public void ExportsPackageRuntimeAssebmlies()
         {
             var description = CreateDescription(
                 new LockFileTargetLibrary()
@@ -120,7 +93,7 @@ namespace Microsoft.DotNet.ProjectModel.Tests
         }
 
         [Fact]
-        private void ExportsSources()
+        public void ExportsSources()
         {
             var description = CreateDescription(
                package: new LockFilePackageLibrary()
@@ -142,7 +115,7 @@ namespace Microsoft.DotNet.ProjectModel.Tests
         }
 
         [Fact]
-        private void ExportsCopyToOutputContentFiles()
+        public void ExportsCopyToOutputContentFiles()
         {
             var description = CreateDescription(
                 new LockFileTargetLibrary()
@@ -170,7 +143,7 @@ namespace Microsoft.DotNet.ProjectModel.Tests
 
 
         [Fact]
-        private void ExportsResourceContentFiles()
+        public void ExportsResourceContentFiles()
         {
             var description = CreateDescription(
                 new LockFileTargetLibrary()
@@ -196,7 +169,7 @@ namespace Microsoft.DotNet.ProjectModel.Tests
         }
 
         [Fact]
-        private void ExportsCompileContentFiles()
+        public void ExportsCompileContentFiles()
         {
             var description = CreateDescription(
                 new LockFileTargetLibrary()
@@ -224,7 +197,7 @@ namespace Microsoft.DotNet.ProjectModel.Tests
 
 
         [Fact]
-        private void SelectsContentFilesOfProjectCodeLanguage()
+        public void SelectsContentFilesOfProjectCodeLanguage()
         {
             var description = CreateDescription(
                 new LockFileTargetLibrary()
@@ -264,7 +237,7 @@ namespace Microsoft.DotNet.ProjectModel.Tests
         }
 
         [Fact]
-        private void SelectsContentFilesWithNoLanguageIfProjectLanguageNotMathed()
+        public void SelectsContentFilesWithNoLanguageIfProjectLanguageNotMathed()
         {
             var description = CreateDescription(
                 new LockFileTargetLibrary()
@@ -295,5 +268,84 @@ namespace Microsoft.DotNet.ProjectModel.Tests
             libraryAsset.RelativePath.Should().Be(Path.Combine("content", "file.any"));
             libraryAsset.ResolvedPath.Should().Be(Path.Combine(PackagePath, "content", "file.any"));
         }
+
+        [Fact]
+        public void ExportsRuntimeTargets()
+        {
+            var win8Native = Path.Combine("native", "win8-x64", "Native.dll");
+            var win8Runtime = Path.Combine("runtime", "win8-x64", "Runtime.dll");
+            var linuxNative = Path.Combine("native", "linux", "Native.dll");
+
+            var description = CreateDescription(
+               new LockFileTargetLibrary()
+               {
+                   RuntimeTargets = new List<LockFileRuntimeTarget>()
+                   {
+                    new LockFileRuntimeTarget(
+                        path: win8Native,
+                        runtime: "win8-x64",
+                        assetType: "native"
+                    ),
+                    new LockFileRuntimeTarget(
+                        path: win8Runtime,
+                        runtime: "win8-x64",
+                        assetType: "runtime"
+                    ),
+                    new LockFileRuntimeTarget(
+                        path: linuxNative,
+                        runtime: "linux",
+                        assetType: "native"
+                    ),
+                   }
+               });
+
+            var result = ExportSingle(description);
+            result.RuntimeTargets.Should().HaveCount(2);
+
+            var runtimeTarget = result.RuntimeTargets.Should().Contain(t => t.Runtime == "win8-x64").Subject;
+            var runtime = runtimeTarget.RuntimeAssemblies.Single();
+            runtime.RelativePath.Should().Be(win8Runtime);
+            runtime.ResolvedPath.Should().Be(Path.Combine(PackagePath, win8Runtime));
+
+            var native = runtimeTarget.NativeLibraries.Single();
+            native.RelativePath.Should().Be(win8Native);
+            native.ResolvedPath.Should().Be(Path.Combine(PackagePath, win8Native));
+
+            runtimeTarget = result.RuntimeTargets.Should().Contain(t => t.Runtime == "linux").Subject;
+            native = runtimeTarget.NativeLibraries.Single();
+            native.RelativePath.Should().Be(linuxNative);
+            native.ResolvedPath.Should().Be(Path.Combine(PackagePath, linuxNative));
+        }
+
+        private LibraryExport ExportSingle(LibraryDescription description = null)
+        {
+            var rootProject = new Project()
+            {
+                Name = "RootProject",
+                CompilerName = "csc"
+            };
+
+            var rootProjectDescription = new ProjectDescription(
+                new LibraryRange(),
+                rootProject,
+                new LibraryRange[] { },
+                new TargetFrameworkInformation(),
+                true);
+
+            if (description == null)
+            {
+                description = rootProjectDescription;
+            }
+            else
+            {
+                description.Parents.Add(rootProjectDescription);
+            }
+
+            var libraryManager = new LibraryManager(new[] { description }, new DiagnosticMessage[] { }, "");
+            var allExports = new LibraryExporter(rootProjectDescription, libraryManager, "config", "runtime", "basepath", "solutionroot").GetAllExports();
+            var export = allExports.Single();
+            return export;
+        }
+
     }
 }

test/Microsoft.Extensions.DependencyModel.Tests/CompositeResolverTests.cs

@@ -3,6 +3,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using Microsoft.Extensions.DependencyModel;
 using Microsoft.Extensions.DependencyModel.Resolution;
 using Moq;
@@ -54,7 +55,14 @@ namespace StreamForwarderTests
                 failTwo.Object
             };
 
-            var library = new CompilationLibrary(string.Empty, string.Empty, string.Empty, string.Empty, null, null, false);
+            var library = new CompilationLibrary(
+                string.Empty,
+                string.Empty,
+                string.Empty,
+                string.Empty,
+                Enumerable.Empty<string>(),
+                Enumerable.Empty<Dependency>(),
+                false);
 
             var resolver = new CompositeCompilationAssemblyResolver(resolvers);
             var result = resolver.TryResolveAssemblyPaths(library, null);
@@ -82,7 +90,14 @@ namespace StreamForwarderTests
             };
 
             var assemblies = new List<string>();
-            var library = new CompilationLibrary(string.Empty, string.Empty, string.Empty, string.Empty, null, null, false);
+            var library = new CompilationLibrary(
+                string.Empty,
+                string.Empty,
+                string.Empty,
+                string.Empty,
+                Enumerable.Empty<string>(),
+                Enumerable.Empty<Dependency>(),
+                false);
 
             var resolver = new CompositeCompilationAssemblyResolver(resolvers);
             var result = resolver.TryResolveAssemblyPaths(library, assemblies);

test/Microsoft.Extensions.DependencyModel.Tests/DependencyContextBuilderTests.cs

@@ -104,9 +104,24 @@ namespace Microsoft.Extensions.DependencyModel.Tests
                             LibraryType.ReferenceAssembly,
                             LibraryDependencyType.Default)
                     }),
+                    resourceAssemblies: new[]
+                    {
+                        new LibraryResourceAssembly(
+                            new LibraryAsset("Dll", "en-US/Pack.Age.resources.dll", ""),
+                            "en-US"
+                            )
+                    },
                     runtimeAssemblies: new[]
                     {
                         new LibraryAsset("Dll", "lib/Pack.Age.dll", ""),
+                    },
+                    runtimeTargets: new []
+                    {
+                        new LibraryRuntimeTarget(
+                            "win8-x64",
+                            new [] { new LibraryAsset("Dll", "win8-x64/Pack.Age.dll", "") },
+                            new [] { new LibraryAsset("Dll", "win8-x64/Pack.Age.native.dll", "") }
+                            )
                     }
                     ),
                 Export(ReferenceAssemblyDescription("System.Collections",
@@ -126,6 +141,11 @@ namespace Microsoft.Extensions.DependencyModel.Tests
             lib.Version.Should().Be("1.2.3");
             lib.Dependencies.Should().OnlyContain(l => l.Name == "System.Collections" && l.Version == "3.3.3");
             lib.Assemblies.Should().OnlyContain(l => l.Path == "lib/Pack.Age.dll");
+            lib.ResourceAssemblies.Should().OnlyContain(l => l.Path == "en-US/Pack.Age.resources.dll" && l.Locale == "en-US");
+
+            var target = lib.RuntimeTargets.Should().Contain(t => t.Runtime == "win8-x64").Subject;
+            target.Assemblies.Should().OnlyContain(l => l.Path == "win8-x64/Pack.Age.dll");
+            target.NativeLibraries.Should().OnlyContain(l => l == "win8-x64/Pack.Age.native.dll");
 
             var asm = context.RuntimeLibraries.Should().Contain(l => l.Name == "System.Collections").Subject;
             asm.Type.Should().Be("referenceassembly");
@@ -204,7 +224,7 @@ namespace Microsoft.Extensions.DependencyModel.Tests
         public void SkipsBuildDependencies()
         {
             var context = Build(compilationExports: new[]
-           {
+            {
                 Export(PackageDescription("Pack.Age",
                     dependencies: new[]
                     {
@@ -225,18 +245,16 @@ namespace Microsoft.Extensions.DependencyModel.Tests
         private LibraryExport Export(
             LibraryDescription description,
             IEnumerable<LibraryAsset> compilationAssemblies = null,
-            IEnumerable<LibraryAsset> runtimeAssemblies = null)
+            IEnumerable<LibraryAsset> runtimeAssemblies = null,
+            IEnumerable<LibraryRuntimeTarget> runtimeTargets = null,
+            IEnumerable<LibraryResourceAssembly> resourceAssemblies = null)
         {
-            return new LibraryExport(
-                description,
-                compilationAssemblies ?? Enumerable.Empty<LibraryAsset>(),
-                Enumerable.Empty<LibraryAsset>(),
-                runtimeAssemblies ?? Enumerable.Empty<LibraryAsset>(),
-                Enumerable.Empty<LibraryAsset>(),
-                Enumerable.Empty<LibraryAsset>(),
-                Enumerable.Empty<LibraryAsset>(),
-                Enumerable.Empty<AnalyzerReference>()
-            );
+            return LibraryExportBuilder.Create(description)
+                .WithCompilationAssemblies(compilationAssemblies)
+                .WithRuntimeAssemblies(runtimeAssemblies)
+                .WithRuntimeTargets(runtimeTargets)
+                .WithResourceAssemblies(resourceAssemblies)
+                .Build();
         }
 
         private PackageDescription PackageDescription(

test/Microsoft.Extensions.DependencyModel.Tests/DependencyContextJsonReaderTest.cs

@@ -183,6 +183,9 @@ namespace Microsoft.Extensions.DependencyModel.Tests
                 ""runtimeTargets"": {
                     ""lib/win7/System.Banana.dll"": { ""assetType"": ""runtime"", ""rid"": ""win7-x64""},
                     ""lib/win7/Banana.dll"": { ""assetType"": ""native"", ""rid"": ""win7-x64""}
+                },
+                ""resources"": {
+                    ""System.Banana.resources.dll"": { ""locale"": ""en-US"" }
                 }
             }
         }
@@ -211,6 +214,8 @@ namespace Microsoft.Extensions.DependencyModel.Tests
             package.Type.Should().Be("package");
             package.Serviceable.Should().Be(false);
             package.Assemblies.Should().Contain(a => a.Path == "lib/dotnet5.4/System.Banana.dll");
+            package.ResourceAssemblies.Should().Contain(a => a.Path == "System.Banana.resources.dll")
+                .Subject.Locale.Should().Be("en-US");
 
             var target = package.RuntimeTargets.Should().Contain(t => t.Runtime == "win7-x64").Subject;
             target.Assemblies.Should().Contain(a => a.Path == "lib/win7/System.Banana.dll");

test/Microsoft.Extensions.DependencyModel.Tests/DependencyContextJsonWriterTests.cs

@@ -154,6 +154,7 @@ namespace Microsoft.Extensions.DependencyModel.Tests
                                         "1.2.3",
                                         "HASH",
                                         new [] { RuntimeAssembly.Create("Banana.dll")},
+                                        new [] { new ResourceAssembly("en-US\\Banana.Resource.dll", "en-US")},
                                         new []
                                         {
                                             new RuntimeTarget("win7-x64",
@@ -187,6 +188,10 @@ namespace Microsoft.Extensions.DependencyModel.Tests
             nativeLibrary.Should().HavePropertyValue("rid", "win7-x64");
             nativeLibrary.Should().HavePropertyValue("assetType", "native");
 
+            var resourceAssemblies = library.Should().HavePropertyAsObject("resources").Subject;
+            var resourceAssembly = resourceAssemblies.Should().HavePropertyAsObject("en-US\\Banana.Resource.dll").Subject;
+            resourceAssembly.Should().HavePropertyValue("locale", "en-US");
+
             //libraries
             var libraries = result.Should().HavePropertyAsObject("libraries").Subject;
             library = libraries.Should().HavePropertyAsObject("PackageName/1.2.3").Subject;
@@ -224,6 +229,7 @@ namespace Microsoft.Extensions.DependencyModel.Tests
                                         "1.2.3",
                                         "HASH",
                                         new [] { RuntimeAssembly.Create("Banana.dll")},
+                                        new ResourceAssembly[] {},
                                         new []
                                         {
                                             new RuntimeTarget("win7-x64",
@@ -283,6 +289,7 @@ namespace Microsoft.Extensions.DependencyModel.Tests
                                         "1.2.3",
                                         "HASH",
                                         new [] { RuntimeAssembly.Create("Banana.dll")},
+                                        new ResourceAssembly[] {},
                                         new RuntimeTarget[] {},
                                         new [] {
                                             new Dependency("Fruits.Abstract.dll","2.0.0")
@@ -308,6 +315,74 @@ namespace Microsoft.Extensions.DependencyModel.Tests
             library.Should().HavePropertyValue("serviceable", true);
         }
 
+        [Fact]
+        public void WritesResourceAssembliesForNonPortable()
+        {
+            var result = Save(Create(
+                            "Target",
+                            "runtime",
+                            false,
+                            runtimeLibraries: new[]
+                            {
+                                new RuntimeLibrary(
+                                        "package",
+                                        "PackageName",
+                                        "1.2.3",
+                                        "HASH",
+                                        new RuntimeAssembly[] { },
+                                        new []
+                                        {
+                                            new ResourceAssembly("en-US/Fruits.resources.dll", "en-US")
+                                        },
+                                        new RuntimeTarget[] { },
+                                        new Dependency[] { },
+                                        true
+                                    ),
+                            }));
+
+            var targets = result.Should().HavePropertyAsObject("targets").Subject;
+            var target = targets.Should().HavePropertyAsObject("Target/runtime").Subject;
+            var library = target.Should().HavePropertyAsObject("PackageName/1.2.3").Subject;
+            var resources = library.Should().HavePropertyAsObject("resources").Subject;
+            var resource = resources.Should().HavePropertyAsObject("en-US/Fruits.resources.dll").Subject;
+            resource.Should().HavePropertyValue("locale", "en-US");
+        }
+
+
+        [Fact]
+        public void WritesResourceAssembliesForPortable()
+        {
+            var result = Save(Create(
+                            "Target",
+                            "runtime",
+                            true,
+                            runtimeLibraries: new[]
+                            {
+                                new RuntimeLibrary(
+                                        "package",
+                                        "PackageName",
+                                        "1.2.3",
+                                        "HASH",
+                                        new RuntimeAssembly[] { },
+                                        new []
+                                        {
+                                            new ResourceAssembly("en-US/Fruits.resources.dll", "en-US")
+                                        },
+                                        new RuntimeTarget[] { },
+                                        new Dependency[] { },
+                                        true
+                                    ),
+                            }));
+
+            var targets = result.Should().HavePropertyAsObject("targets").Subject;
+            var target = targets.Should().HavePropertyAsObject("Target").Subject;
+            var library = target.Should().HavePropertyAsObject("PackageName/1.2.3").Subject;
+            var resources = library.Should().HavePropertyAsObject("resources").Subject;
+            var resource = resources.Should().HavePropertyAsObject("en-US/Fruits.resources.dll").Subject;
+            resource.Should().HavePropertyValue("locale", "en-US");
+        }
+
+
         [Fact]
         public void WritesCompilationOptions()
         {