/// <summary>
/// Render the frameworkElement to a "GDI" Icon with the default size.
/// </summary>
/// <param name="frameworkElement">FrameworkElement</param>
/// <param name="size">Optional, specifies the size, if not given the system default is used</param>
/// <returns>Icon</returns>
public static Icon ToIcon(this FrameworkElement frameworkElement, int?size = null)
{
if (frameworkElement == null)
{
throw new ArgumentNullException(nameof(frameworkElement));
}
int iconSize = size ?? User32Api.GetSystemMetrics(SystemMetric.SM_CXICON);
var stream = new MemoryStream();
frameworkElement.WriteAsIconToStream(stream, new[] { iconSize });
// Reset the stream position, otherwise the icon won't be read correctly (pointer is behind the icon)
stream.Seek(0, SeekOrigin.Begin);
return(new Icon(stream, iconSize, iconSize));
}