g3.ColumnDefinitions.Add(new ColumnDefinition());
            tbv1 = this.g3.Children.Add(new Button());
            ((Button)this.g3.Children[tbv1]).Content = tbv1.ToString();
            ((Button)this.g3.Children[tbv1]).SetValue(Grid.ColumnProperty, tbv1);
            ((Button)this.g3.Children[tbv1]).Click += new System.Windows.RoutedEventHandler(B_Click);
            ((Button)this.g3.Children[tbv1]).Tag = tbv1;
            

private void B_Click(object sender, RoutedEventArgs e)
        {
            int i=(int)((Button)sender).Tag;
            g3.Children.RemoveAt(i);
            g3.ColumnDefinitions.RemoveAt(i);
        }