Sleep in GCD with Xamarin

hey,

I spawn a GCD thread and I want to wait a few milliseconds. In Objectivec I would use the c function sleep() but with Xamarin.iOS I have no clue how to do that.I don't want to use a NSTimer and Thread.Sleep() seems to do not work with GCD.

here the code :

DispatchQueue.DefaultGlobalQueue.DispatchAsync (() => { Sleep(2000); });

Any idea how to do that ?