private void BtnAdd_Click(object sender, RoutedEventArgs e)
{
var view = new AddVendorView();
ViewManager.AddUserControl(view);
ViewManager.OpenUserControl(view);
e.Handled = true;
}
private void Edit_Click(object sender, RoutedEventArgs e)
{
var obj = (ButtonWithObject)sender;
var vendor = (Vendor)obj.Object;
var view = new AddVendorView(vendor);
ViewManager.AddUserControl(view);
ViewManager.OpenUserControl(view);
}