title: How to use @selector in Xamarin.iOS
body: <p>Now I want to  implement some functions in my xamarin.iOS projecs . 
  I have found the solution but implemented in Objective-C.And it used the keyword <code>@selector(...)</code> .  I found <a href="https://stackoverflow.com/questions/32187743/how-to-perform-selector-in-c-sharp-like-in-the-objective-c">this issue</a> as refer.However,as @theB said,use the dynamic type. Of course this means that type safety is only enforced at runtime, and you may incur some performance penalties.SO is there a better way to implement it？ Any suggestion is welcome.Thanks！</p>