void _supplierOperationVM_OnSaved(object sender, Supplier e)
{
SupplierCollection.Remove(e);
SupplierCollection.Add(e);
_hardwareOperationVM_OnClosed(sender, new EventArgs {
});
}
private async void DeleteHardwareCommandAction(object obj)
{
await DbHandler.Instance.DeleteSupplier(obj as Supplier);
SupplierCollection.Remove(obj as Supplier);
}