Assembly: WindowsBase (in windowsbase.dll)
the calling thread does not have access to this DispatcherObject.
Only the thread the Dispatcher was created on may access the DispatcherObject.
Any thread can check to see whether it has access to this DispatcherObject.
The difference between CheckAccess and VerifyAccess is that CheckAccess returns a Boolean that specifies whether the calling thread has access to this DispatcherObject and VerifyAccess throws an exception if the calling thread does not have access to the this DispatcherObject.
The following example uses VerifyAccess to determine whether a thread has access to the thread that a Button was created on. If the calling thread does not have access, an InvalidOperationException is thrown.
Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter EditionThe Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.