Adding special case for ExportedTypes, since they should be copied wi…

…th all of their nested types always

src/GenFacades/Program.cs

@@ -485,21 +485,24 @@ private void AddTypeForward(Assembly assembly, INamedTypeDefinition seedType, IA
                     assembly.ExportedTypes = new List<IAliasForType>();
                 assembly.ExportedTypes.Add(alias);
 
-                INamedTypeDefinition contractType = contractAssembly.GetAllTypes().Where(t => t.FullName() == seedType.FullName()).FirstOrDefault();
-                if (contractType == null)
-                    throw new Exception("Type was not found in the contract.");
-
-                // Recursively add forwarders for all the nested types specified in the contract assembly.
+                // Recursively add forwarders for nested types.
                 // NOTE: Some design-time tools can resolve forwarded nested types with only the top-level forwarder,
                 //       but the runtime currently throws a TypeLoadException without explicit forwarders for the nested 
                 //       types.
-                foreach (var nestedType in contractType.NestedTypes.OrderBy(t => t.Name.Value))
+                INamedTypeDefinition contractType = contractAssembly.GetAllTypes().Where(t => t.FullName() == seedType.FullName()).FirstOrDefault();
+                if (contractType != null) // Only add forwarders for the nested types on the contract
                 {
-                    var seedNestedType = seedType.NestedTypes.Where(nt => nt.Name.Value == nestedType.Name.Value).FirstOrDefault();
-                    if (seedNestedType == null)
-                        throw new Exception("Nested type found in the contract, but not on the seedType.");
-                    AddTypeForward(assembly, seedNestedType, contractAssembly);
+                    foreach (var nestedType in contractType.NestedTypes.OrderBy(t => t.Name.Value))
+                    {
+                        var seedNestedType = seedType.NestedTypes.Where(nt => nt.Name.Value == nestedType.Name.Value).FirstOrDefault();
+                        if (seedNestedType == null)
+                            throw new Exception("Nested type found in the contract, but not on the seedType.");
+                        AddTypeForward(assembly, seedNestedType, contractAssembly);
+                    }
                 }
+                else // Add all the nested types for ExportedTypes.
+                    foreach (var nestedType in seedType.NestedTypes.OrderBy(t => t.Name.Value))
+                        AddTypeForward(assembly, nestedType, contractAssembly);
             }
 
             private void AddWin32VersionResource(string contractLocation, Assembly facade)