C # Note28:dispatcher Class

The main methods are as follows:

• Dispatcher.invoke method

Executes the specified delegate synchronously on the thread associated with the Dispatcher.

Focus:
To enable the background thread to access the content property of the button, the background thread must delegate the work to the dispatcher associated with the UI thread.
Use Invoke or BeginInvoke to complete this operation. Invoke is a synchronous operation, and BeginInvoke is an asynchronous operation. This action is added to the Dispatcher event queue by the specified dispatcherpriority. Invoke is a synchronous operation, so control is not returned to the calling object until the callback returns.

C # Note28:dispatcher Class