Corrupted memory exception

Hello,
I am using below code to check if service is active or not (in that I am accesing server state property ).And if it returns true,I am continuing with sharepoint user creation.

public bool StatusCheck(int siteIndex) {
try {
string ChildPath = "IIS://localhost/w3svc/" + siteIndex.ToString() ;
DirectoryEntry ChildObj = new DirectoryEntry(ChildPath);

int status = (Int32) ChildObj.Properties["ServerState"].Value;
if (status ==2 || status ==1 )
return true ;

if (status ==4 )
return false;

return false;
}
catch(Exception e) {
throw e;
}
}