public class MyCustomColumn : GridViewDataColumn
{
    public MyCustomColumn()
    {
        Background = Brushes.Red;
    }

    public override FrameworkElement CreateCellElement(GridViewCell cell, object dataItem)
    {
        HighlightTextBlock highlightTextBlock =  cell.Content as HighlightTextBlock;

        if (ShouldCreateNewTextBlock(highlightTextBlock))
        {
            highlightTextBlock = new HighlightTextBlock
            {
                DataType = DataType,
                HorizontalAlignment = HorizontalAlignment.Stretch,
                VerticalAlignment = VerticalAlignment.Center,
            };
            highlightTextBlock.SetBinding(HighlightTextBlock.TextProperty, DataMemberBinding);
        }

        Validation.SetErrorTemplate(highlightTextBlock, new ControlTemplate());
        return highlightTextBlock;
    }

    private bool ShouldCreateNewTextBlock(HighlightTextBlock highlightTextBlock)
    {
        return highlightTextBlock == null || highlightTextBlock is not HighlightTextBlock;
    }

    public override bool CanEdit(object item) => true;
}