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 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.