Here is a quick example how you can call WCF Service using silverlight 2.
Add a service reference in Silverlight Protject
See Below for code example….
AService.AWSClient c = new A.AService.AWSClient();
c.ValidateLoginCompleted += new EventHandler
<A.AService.ValidateLoginCompletedEventArgs>
(c_ValidateLoginCompleted);
c.ValidateLoginAsync(“admin”, “password”);
void c_ValidateLoginCompleted(object sender,
A.AService.ValidateLoginCompletedEventArgs e)
{
AService.Player p = e.Result;
MessageBox.Show(p.sBirthDate.ToString());
}