Multi Project Validator

A tool which searches recursively for project.json files,
runs a set of analyses and reports on the result.

For CLI we have only one rule currently, that Dependencies
between projects must be equivalent to avoid stomping.

tools/MultiProjectValidator/ProjectLoader.cs

@@ -0,0 +1,41 @@
+using System;
+using System.IO;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.DotNet.ProjectModel;
+
+namespace MultiProjectValidator
+{
+    public class ProjectLoader
+    {
+        private static readonly string PROJECT_FILENAME = "project.json";
+
+        public static List<ProjectContext> Load(string rootPath, bool recursive=true)
+        {
+            var projectFiles = DiscoverProjectFiles(rootPath);
+            var projectContextList = LoadProjectContexts(projectFiles);
+
+            return projectContextList;
+        }
+
+        private static string[] DiscoverProjectFiles(string rootPath)
+        {
+            return Directory.GetFiles(rootPath, PROJECT_FILENAME, SearchOption.AllDirectories);
+        }
+
+        private static List<ProjectContext> LoadProjectContexts(string[] projectFiles)
+        {
+            var projectContexts = new List<ProjectContext>();
+
+            foreach (var file in projectFiles)
+            {
+                var fileTargetContexts = ProjectContext.CreateContextForEachTarget(file);
+
+                projectContexts.AddRange(fileTargetContexts);    
+            }
+
+            return projectContexts;
+        }
+    }
+}