{"action":"created","comment":{"url":"https://api.github.com/repos/dotnet/roslyn/pulls/comments/27163759","id":27163759,"diff_hunk":"@@ -110,6 +121,62 @@ internal static ImmutableArray<MetadataReference> MakeAssemblyReferences(this Im\n             return referencesBuilder.ToImmutableAndFree();\n         }\n \n+        /// <summary>\n+        /// Add aliases to any strong-named duplicate assemblies that differ\n+        /// by version, preferring the version referenced from the target module.\n+        /// </summary>\n+        private static void AddAliasesToDuplicateAssemblies(\n+            ArrayBuilder<MetadataReference> references,\n+            ArrayBuilder<AssemblyIdentity> identities,\n+            AssemblyIdentityComparer identityComparer,\n+            ArrayBuilder<AssemblyIdentity> referencedModules)\n+        {\n+            Debug.Assert(references.Count == identities.Count);\n+\n+            // Dictionary to ensure exactly one unique alias\n+            // is added to each AssemblyIdentity.\n+            var duplicateIdentities = PooledDictionary<AssemblyIdentity, string>.GetInstance();\n+\n+            // Find duplicate pairs.\n+            int n = identities.Count;\n+            foreach (var referencedModule in referencedModules)\n+            {\n+                if (!referencedModule.IsStrongName)\n+                {\n+                    continue;\n+                }\n+                for (int i = 0; i < n; i++)\n+                {\n+                    var identity = identities[i];\n+                    var compareResult = identityComparer.Compare(referencedModule, identity);\n+                    // Only need to handle assemblies that differ by version since\n+                    // ReferenceManager will drop equivalent assemblies.\n+                    if (compareResult != AssemblyIdentityComparer.ComparisonResult.EquivalentIgnoringVersion)\n+                    {\n+                        continue;\n+                    }\n+                    duplicateIdentities[identity] = Guid.NewGuid().ToString();\n+                }\n+            }\n+\n+            Debug.Assert(references.All(r => r.Properties.Aliases.IsEmpty));","path":"src/ExpressionEvaluator/Core/Source/ExpressionCompiler/MetadataUtilities.cs","position":111,"original_position":111,"commit_id":"95b724a38409c45c73e0fc0963f067b92fd75491","original_commit_id":"95b724a38409c45c73e0fc0963f067b92fd75491","user":{"login":"cston","id":10732005,"avatar_url":"https://avatars.githubusercontent.com/u/10732005?v=3","gravatar_id":"","url":"https://api.github.com/users/cston","html_url":"https://github.com/cston","followers_url":"https://api.github.com/users/cston/followers","following_url":"https://api.github.com/users/cston/following{/other_user}","gists_url":"https://api.github.com/users/cston/gists{/gist_id}","starred_url":"https://api.github.com/users/cston/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/cston/subscriptions","organizations_url":"https://api.github.com/users/cston/orgs","repos_url":"https://api.github.com/users/cston/repos","events_url":"https://api.github.com/users/cston/events{/privacy}","received_events_url":"https://api.github.com/users/cston/received_events","type":"User","site_admin":false},"body":"Yes, 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