public override Task OnDisconnected()
{
ServiceReference2.WebService1Soap ws = new ServiceReference2.WebService1SoapClient();
string msg = ws.DeleteSession("bcce7f7ad7596f963f4adb23d713e0d4", "329392de8a55edf86c0881a57381cbe6", Context.User.Identity.Name, Context.ConnectionId);
if (msg != "ok")
{
Clients.Caller.ErrorOnServer("msg");
}
return base.OnDisconnected();
}