private void ClearAddDepartment(object sender, DialogClosingEventArgs eventArgs)
 {
     DepartmentNameTextBox.Clear();
     validation.Text = "";
 }
 private void ClearButton_Click(object sender, EventArgs e)
 {
     DepartmentNoTextBox.Clear();
     DepartmentNameTextBox.Clear();
     DepartmentLocationTextBox.Clear();
 }