public static string GetMachinePrincipalName()
{
string Result = ".";
try
{
ManagementScope localWMI = new ManagementScope(ManagementPath.DefaultPath);
localWMI.Connect();
ObjectQuery query = new ObjectQuery("SELECT * FROM Win32_ComputerSystem");
ManagementObjectSearcher computerSystemSearcher = null;
ManagementObjectCollection computerSystemList = null;
ManagementObjectEnumerator computerSystemEnum = null;
try
{
computerSystemSearcher = new ManagementObjectSearcher(localWMI, query);
computerSystemList = computerSystemSearcher.Get();
computerSystemEnum = computerSystemList.GetEnumerator();
if (computerSystemEnum.MoveNext())
{
var computerSystem = computerSystemEnum.Current;
if ((bool)computerSystem["PartOfDomain"])
{
Result = computerSystem["DNSHostName"].ToString() + "." + computerSystem["Domain"].ToString();
}
else
{
Result = computerSystem["DNSHostName"].ToString();
}
}
else
{
throw new ArgumentNullException("No instances of Win32_ComputerSystem WMI class returned.");
}
}
finally
{
if (computerSystemEnum != null)
{
computerSystemEnum.Dispose();
}
if (computerSystemList != null)
{
computerSystemList.Dispose();
}
if (computerSystemSearcher != null)
{
computerSystemSearcher.Dispose();
}
}
}
catch
{
Result = Environment.MachineName;
}
return(Result);
}
