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/ProjectAnalyzer.cs

@@ -0,0 +1,46 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.DotNet.ProjectModel;
+using MultiProjectValidator.AnalysisRules;
+
+namespace MultiProjectValidator
+{
+    public class ProjectAnalyzer
+    {
+
+        public static ProjectAnalyzer Create(List<ProjectContext> projectContexts)
+        {
+            // Any Additional rules would be added here
+            var rules = new List<IAnalysisRule>
+            {
+                new DependencyMismatchRule()
+            };
+
+            return new ProjectAnalyzer(rules, projectContexts);
+        }
+
+        private List<ProjectContext> projectContexts;
+        private List<IAnalysisRule> rules;
+        
+        private ProjectAnalyzer(List<IAnalysisRule> rules, List<ProjectContext> projectContexts)
+        {
+            this.rules = rules;
+            this.projectContexts = projectContexts;
+        }
+
+        public List<AnalysisResult> DoAnalysis()
+        {
+            var results = new List<AnalysisResult>();
+
+            foreach(var rule in rules)
+            {
+                results.Add(rule.Evaluate(projectContexts));
+            }
+
+            return results;
+        }
+
+    }
+}