public override void ViewDidLoad()
        {
            base.ViewDidLoad();

            // Perform any additional setup after loading the view, typically from a nib.

            bntLogin.TouchUpInside += (object sender, EventArgs e) => {
                string usuario = txtLogin.Text;
                string senha   = txtSenha.Text;

                webserviceTeste.Service1 ws = new webserviceTeste.Service1();
                lblStatus.Text = ws.MakeLogin(usuario, senha) ? "OK" : "Não OK";
            };
        }
		public override void ViewDidLoad ()
		{
			base.ViewDidLoad ();
			
			// Perform any additional setup after loading the view, typically from a nib.

			bntLogin.TouchUpInside += (object sender, EventArgs e) => {
				string usuario = txtLogin.Text;
				string senha = txtSenha.Text;

				webserviceTeste.Service1 ws = new webserviceTeste.Service1 ();
				lblStatus.Text = ws.MakeLogin (usuario, senha) ? "OK" : "Não OK";
			};
		}