monodroid , C# , web Service can some one help me

See more:

C#

ASP.NET

MonoForAndroid

i am trying to connect android app with web service,
i am using monodroid c# visual studio 2010.

the funcion of webservice is normal fucniton helloworld()
the webservice funciton work fine i try it in normal web form web side asp.net
but wanna i try to us on monodroid i have problem

this is the code how i use

tx = FindViewById<TextView>(Resource.Id.textView1);
            try
            {
                WS.GetDatas tc = new WS.GetDatas();
                tc.HelloWorldCompleted += new
                WS.HelloWorldCompletedEventHandler( tc_HelloWorldCompleted);
                tc.HelloWorldAsync();

            }
            catch (Exception er)
            {
                tx.Text = "Connecting Fail :( \n " + er.ToString();
            }
}

        void tc_HelloWorldCompleted(object sender,                 WS.HelloWorldCompletedEventArgs e)
        {
            this.RunOnUiThread(() => tx.Text = e.Result);
        }

and this is what i get like error


Unhandled Exception:

System.Reflection.TargetInvocationException:
Break Continue Ignor

on this file Reference.cs funcion

public string Result {
            get {
                this.RaiseExceptionIfNecessary();
                return ((string)(this.results[0]));
            }
        }
    }

i add request permissions internet;
give me any suggeston or code or tutorial or what else,how to connect with monodroid webservice
sory for my bad english
thnx all for help