> private static string GetMacAddress()
> {
>     ManagementClass mc = new ManagementClass("Win32_NetworkAdapter");
>     foreach (ManagementObject mo in mc.GetInstances())
>     {
>     string macAddr = mo["MACAddress"] as string;
>     if ( macAddr != null && macAddr.Trim() != "" )
>     return macAddr;
>     }
>     // no NICs found
>     return "";
> }
> ************** Exception Text **************
> System.TypeInitializationException: The type initializer for
> "System.Management.ManagementBaseObject" threw an exception. --->
> System.Runtime.InteropServices.COMException (0x80040154): COM object with
> CLSID {674B6698-EE92-11D0-AD71-00C04FD8FDFF} is either not valid or not
> registered.
> at System.Management.ManagementBaseObject..cctor()
> --- End of inner exception stack trace ---
> at

> private static string GetMacAddress()
> {
>     ManagementClass mc = new ManagementClass("Win32_NetworkAdapter");
>     foreach (ManagementObject mo in mc.GetInstances())
>     {
>     string macAddr = mo["MACAddress"] as string;
>     if ( macAddr != null && macAddr.Trim() != "" )
>     return macAddr;
>     }
>     // no NICs found
>     return "";
> }
> ************** Exception Text **************
> System.TypeInitializationException: The type initializer for
> "System.Management.ManagementBaseObject" threw an exception. --->
> System.Runtime.InteropServices.COMException (0x80040154): COM object with
> CLSID {674B6698-EE92-11D0-AD71-00C04FD8FDFF} is either not valid or not
> registered.
> at System.Management.ManagementBaseObject..cctor()
> --- End of inner exception stack trace ---
> at

> > This code works on 2000 and breaks on Windows98:

> > private static string GetMacAddress()
> > {
> >     ManagementClass mc = new ManagementClass("Win32_NetworkAdapter");
> >     foreach (ManagementObject mo in mc.GetInstances())
> >     {
> >     string macAddr = mo["MACAddress"] as string;
> >     if ( macAddr != null && macAddr.Trim() != "" )
> >     return macAddr;
> >     }
> >     // no NICs found
> >     return "";
> > }
> > ************** Exception Text **************
> > System.TypeInitializationException: The type initializer for
> > "System.Management.ManagementBaseObject" threw an exception. --->
> > System.Runtime.InteropServices.COMException (0x80040154): COM object
with
> > CLSID {674B6698-EE92-11D0-AD71-00C04FD8FDFF} is either not valid or not
> > registered.
> > at System.Management.ManagementBaseObject..cctor()
> > --- End of inner exception stack trace ---
> > at
> System.Management.ManagementBaseObject..ctor(IWbemClassObjectFreeThreaded
> > wbemObject)
> > at System.Management.ManagementObject..ctor(ManagementScope scope,
> > ManagementPath path, ObjectGetOptions options)
> > at System.Management.ManagementClass..ctor(ManagementScope scope,
> > ManagementPath path, ObjectGetOptions options)
> > at System.Management.ManagementClass..ctor(String path)

> Guid = "Random Number" + Time + MAc Address

> Thaks
> Subbu

> > Is there a single method in C#  that can retreve machine MAC Address
that
> > works on all supported .Net platforms?
> > -phil