相关疑难解决方法(0)

ios在xamarin表单中运行时出现此错误.我该如何解决这个问题？

System.TypeLoadException:无法使用标记0100000f解析类型

[Register("AppDelegate")]
public partial class AppDelegate : global::Xamarin.Forms.Platform.iOS.FormsApplicationDelegate
{

    public override bool FinishedLaunching(UIApplication app, NSDictionary options)
    {
        global::Xamarin.Forms.Forms.Init();
        LoadApplication(new App());

        return base.FinishedLaunching(app, options);
    }
}