public static void func_pointer_marshalling() { test.ITesting obj = new test.Testing(); bool called = false; eina.Strbuf buf = new eina.Strbuf(); string argument = "Some String"; eina.Value v = new eina.Value(eina.ValueType.String); v.Set(argument); string reference = new string(argument.ToCharArray().Reverse().ToArray()); obj.CallFormatCb(buf, v, (eina.Strbuf ibuf, eina.Value val) => { called = true; string str = null; val.Get(out str); buf.Append(new string(str.ToCharArray().Reverse().ToArray())); }); Test.Assert(called, "Callback was not called"); Test.AssertEquals(reference, buf.Steal()); }