Fixed code generation for using template types.

Thanks to @zillemarco for coming up with the test case.

src/Generator/Generators/CSharp/CSharpTypePrinter.cs

@@ -355,6 +355,10 @@ namespace CppSharp.Generators.CSharp
                     template.Arguments.All(IsValid))
                     return $@"{VisitDeclaration(decl)}<{string.Join(", ",
                         template.Arguments.Select(VisitTemplateArgument))}>";
+
+                if (ContextKind == TypePrinterContextKind.Native)
+                    return template.Desugared.Visit(this);
+
                 return decl.Visit(this);
             }
 

tests/Common/Common.h

@@ -1402,3 +1402,13 @@ union
         } Share;
     } Smb2;
 } ProtocolSpecific;
+
+
+template<class _Other>
+using UsingTemplatePtr = _Other *;
+
+struct TemplateWithUsingTemplateMember
+{
+    UsingTemplatePtr<TemplateWithUsingTemplateMember> _Ref;
+};
+