private static float GetDpiX()
{
    try
    {
        using (Bitmap image = new Bitmap(1, 1))
        {
            using (Graphics graphics = Graphics.FromImage(image))
            {
                return graphics.DpiX;
            }
        }
    }
    catch
    {
        return 72;
    }
}


public void SetRowHeightPixel(int row, int pixels)
{
    double height = (double)((float)pixels * 72f / (float)GetDpiX());
    this.SetRowHeight(row, height);
}