ScreenToGif.Windows.Options.GridSizeTextBox_LostFocus C# (CSharp) Method

        private void GridSizeTextBox_LostFocus(object sender, RoutedEventArgs e)
        {
            var textBox = sender as NumericTextBox;

            if (textBox == null) 
                return;
            if (String.IsNullOrEmpty(textBox.Text)) 
                textBox.Text = "10";

            if (textBox.Tag.Equals("Editor"))
                AdjustToSize();
            else
                AdjustToSizeBoard();
        }