private void btnClose_Click(object sender, EventArgs e) { if (txtWorkRequestID.TextLength != 0) { request.WorkID = int.Parse(txtWorkRequestID.Text); if (request.CloseRequest() == true) { Message += new Display.myDelegate(Display.Success); Message.Invoke(); } else { Message += new Display.myDelegate(Display.Failure); Message.Invoke(); } } else { Message += new Display.myDelegate(Display.Error); Message.Invoke(); } }