System::SharedPtr<Project> project = System::MakeObject<Project>(dataDir + u"CreateProject2.mpp");
    
System::SharedPtr<HtmlSaveOptions> options = [&]{ auto tmp_0 = System::MakeObject<HtmlSaveOptions>(); tmp_0->set_CssStylePrefix(u"test_prefix"); return tmp_0; }();
    
project->Save(dataDir + u"TestCssStylePrefix_out.html", options);