Thanks all - this helped me keep my application event log clean.

bool isClustered = false;

ManagementObjectSearcher searcher = new ManagementObjectSearcher(

new ManagementScope(string.Format("\\\\{0}\\root\\cimv2", machineName))

, new ObjectQuery("SELECT PartComponent FROM Win32_SystemServices"));

foreach (ManagementObject iQueryObj in searcher.Get())

{

string name = iQueryObj["PartComponent"].ToString();

if (name.Contains("ClusSvc"))

{

isClustered = true;

}

}