private void btnValidateCsv_Click(object sender, EventArgs e)
    {
        var  mapping = new CsvToDicomTagMapping();
        bool built   = mapping.BuildMap(State, out string log);

        MessageBox.Show(log, $"Validation { (built ? "Success" : "Failure" )}", MessageBoxButtons.OK, built ? MessageBoxIcon.Information: MessageBoxIcon.Error);
    }