Retrieves the difference between the maximum number of thread pool threads returned by the GetMaxThreads method, and the number currently active.
Assembly: mscorlib (in mscorlib.dll)
When returns, the variable specified by workerThreads contains the number of additional worker threads that can be started, and the variable specified by completionPortThreads contains the number of additional asynchronous I/O threads that can be started.
If there are no available threads, additional thread pool requests remain queued until thread pool threads become available.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.