private static System.Collections.Generic.IEnumerable <System.Guid> getGUIDs(string className)
{
uint requiredSize;
var guidArray = new System.Guid[256];
if (SetupDiClassGuidsFromName(className, ref guidArray[0], (uint)guidArray.Count(), out requiredSize))
{
while (requiredSize > 0)
{
yield return(guidArray[--requiredSize]);
}
}
}
