private void AddSupplier_Click(object sender, RoutedEventArgs e)
{
SupplierViewModel cancel = new SupplierViewModel();
cancel.Cancel_Supplier();
AddSupplier _AS = new AddSupplier();
_AS.ShowDialog();
}
private void SupplierListing_Click(object sender, RoutedEventArgs e)
{
SupplierViewModel cancel = new SupplierViewModel();
cancel.Cancel_Supplier();
SupplierListing _SL = new SupplierListing();
_SL.ShowDialog();
}