Fix for Visual Studio 2019 16.10 (#1614)

Author: szilvaa

src/Generator/Generators/CSharp/CSharpSources.cs

@@ -2690,6 +2690,14 @@ private void GenerateMethodBody(Class @class, Method method,
                 {
                     GenerateVirtualFunctionCall(method);
                 }
+                else if (method.IsDestructor)
+                {
+                    // It is possible that HasNonTrivialDestructor property different for specialization vs.
+                    // the template. When we generate the Internal struct we only put a dtor there if the specialization
+                    // has a non-trivial dtor. So we must make sure do the same test here.
+                    if (@class.HasNonTrivialDestructor)
+                        GenerateInternalFunctionCall(method, returnType: returnType);
+                }
                 else
                 {
                     GenerateInternalFunctionCall(method, returnType: returnType);