Update code structure

Author: jaredpar

Basic.Reference.Assemblies.Net461/Generated.cs

@@ -1,4 +1,5 @@
-using System;
+using Microsoft.CodeAnalysis;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
@@ -8,6 +9,15 @@ namespace Basic.Reference.Assemblies.UnitTests
 {
     internal static class Extensions
     {
-        internal static Guid Mvid()
+        public static Guid GetMvid(this PortableExecutableReference peReference)
+        {
+            if (peReference.GetMetadata() is AssemblyMetadata metadata &&
+                metadata.GetModules() is {  Length: > 0 } modules)
+            {
+                return modules[0].GetModuleVersionId();
+            }
+
+            throw new InvalidOperationException();
+        }
     }
 }