private void LoginButton_Click(object sender, EventArgs e) { DataSet DepartmentSet = clientproxy.GetDepartment(); if (DepartmentSet != null && LoginInfo.Authenticated) { MainForm _mainform = new MainForm(DepartmentSet); _mainform.FormBorderStyle = FormBorderStyle.FixedSingle; _mainform.MaximizeBox = false; _mainform.MinimizeBox = false; _mainform.Show(); this.Hide(); } }