Changing the migrate command to obtain the sdk package version from the PackageRef in csproj instead of project.json.

src/dotnet/commands/dotnet-migrate/MigrateCommand.cs

@@ -5,7 +5,6 @@ using System;
 using System.Collections.Generic;
 using System.IO;
 using Microsoft.Build.Construction;
-using Microsoft.DotNet.Cli;
 using Microsoft.DotNet.ProjectJsonMigration;
 using Microsoft.DotNet.ProjectModel;
 
@@ -37,8 +36,9 @@ namespace Microsoft.DotNet.Tools.Migrate
 
             var msBuildTemplate = _templateFile != null ?
                 ProjectRootElement.TryOpen(_templateFile) : _temporaryDotnetNewProject.MSBuildProject;
+            
+            var sdkVersion = _sdkVersion ?? _temporaryDotnetNewProject.MSBuildProject.GetSdkVersion();
 
-            var sdkVersion = _sdkVersion ?? new ProjectJsonParser(_temporaryDotnetNewProject.ProjectJson).SdkPackageVersion;
             EnsureNotNull(sdkVersion, "Null Sdk Version");
 
             foreach (var project in projectsToMigrate)

src/dotnet/commands/dotnet-migrate/ProjectRootElementExtensions.cs

@@ -0,0 +1,18 @@
+using System.Linq;
+using Microsoft.Build.Construction;
+using Microsoft.DotNet.ProjectJsonMigration;
+
+namespace Microsoft.DotNet.Tools.Migrate
+{
+    public static class ProjectRootElementExtensions
+    {
+        public static string GetSdkVersion(this ProjectRootElement projectRootElement)
+        {
+            return projectRootElement
+                .Items
+                .Where(i => i.ItemType == "PackageReference")
+                .First(i=> i.Include == ConstantPackageNames.CSdkPackageName)
+                .GetMetadataWithName("version").Value;
+        }
+    }
+}

src/dotnet/commands/dotnet-migrate/TemporaryDotnetNewTemplateProject.cs

@@ -1,11 +1,8 @@
 using Microsoft.Build.Construction;
 using Microsoft.DotNet.Cli;
-using Newtonsoft.Json.Linq;
 using System;
 using System.Collections.Generic;
 using System.IO;
-using System.Linq;
-using System.Threading.Tasks;
 using Microsoft.DotNet.ProjectJsonMigration;
 
 namespace Microsoft.DotNet.Tools.Migrate
@@ -17,13 +14,11 @@ namespace Microsoft.DotNet.Tools.Migrate
         private readonly string _projectDirectory;
 
         public ProjectRootElement MSBuildProject { get; }
-        public JObject ProjectJson { get; }
 
         public TemporaryDotnetNewTemplateProject()
         {
             _projectDirectory = CreateDotnetNewMSBuild(c_temporaryDotnetNewMSBuildProjectName);
             MSBuildProject = GetMSBuildProject(_projectDirectory);
-            ProjectJson = GetProjectJson(_projectDirectory);
 
             Clean();
         }
@@ -60,12 +55,6 @@ namespace Microsoft.DotNet.Tools.Migrate
             return ProjectRootElement.Open(templateProjPath);
         }
 
-        private JObject GetProjectJson(string temporaryDotnetNewMSBuildDirectory)
-        {
-            var projectJsonFile = Path.Combine(temporaryDotnetNewMSBuildDirectory, "project.json");
-            return JObject.Parse(File.ReadAllText(projectJsonFile));
-        }
-
         private void RunCommand(string commandToExecute, IEnumerable<string> args, string workingDirectory)
         {
             var command = new DotNetCommandFactory()

src/dotnet/commands/dotnet-new/CSharp_Console/project.json.template

@@ -12,7 +12,8 @@
           "type": "platform",
           "version": "1.0.1"
         }
-      }
+      },
+      "imports": "dnxcore50"
     }
   }
 }