H Nathan,

the WFSO Function is available in .net, since you can invoke it
with PInvoke. Its Signature is like this:

[DllImport("kernel32", SetLastError=true, ExactSpelling=true)]
 internal static extern Int32 WaitForSingleObject(IntPtr handle, Int32
milliseconds);

public static uint INFINITE = 0xFFFFFFFF;

But you should not use it for some .net internal related reasons.
there is a safe "managed" class that will give you the same functionallity
but in a "safe" and .net "managed" way. The Class is called

[WaitHandle Class (System.Threading)]
http://msdn2.microsoft.com/en-us/library/system.threading.waithandle.aspx

Before i used the WaitHandle was used to call the Windows API functions
avec PInvoke but this has several drawbacks like GC issues and Handle
stuff. So use whenever you can use a managed eqivalent in your software
from the .net FW,...use it!

Regards

Kerem