Defines the callback method for thread pool user work items. That method must match this delegate.
C# Syntax:
[Serializable] public delegate void WaitCallback(object state);
Parameters:
The declaration of your event handler must have the same parameters as the
WaitCallback delegate declaration.
state
The object passed to the delegate.
Remarks
Every derived class of Delegate and MulticastDelegate has a constructor and an Invoke method. See the Managed Extensions for C++ code example given in the description for the Delegate class.
For more information about event handler delegates, see .