I cannot find the way to display the Warning in asynch way. My WCF service returns warnings which must be shown as pop-ups. It seems like that secondary client thread, which accepts the WCF result, conflicts with the main UI thread so I cannot see any popups and my app just aborted with no details provided.
WCF tutorial recommends using of RunOnUiThread, but this is for the control. I use the following approach:
Toast.MakeText(this, "Warning!", ToastLength.Short).Show();
and it is not working.