private void btnCancel_Click(object sender, RoutedEventArgs e)
{
MembershipSales Sales = new MembershipSales();
Sales.Show();
this.Close();
}
//The user allows go to MembershipSales by clicking and main menu will be closed
private void lblMembershipSales_MouseUp_1(object sender, MouseButtonEventArgs e)
{
MembershipSales Sales = new MembershipSales();
Sales.Show();
this.Close();
}