How to access WPF controls from another thread?
Like many UI frameworks such as Windows Forms, WPF also imposes a single threading model, which means that you can only access a specified DispatcherObject derivative from the thread which creates it. In Windows Forms, each Control will implement ISynchronizeInvoke interface, this interface exposes a set of methods such as Invoke and BeginInvoke to impose a common thread synchronization contract which we could use to access a control from another thread. In WPF, we also have such type of thing, but those operations are wrapped up in a class called Dispatcher, Dispatcher is WPF way of enabling this type of thread synchronization model.
