How to invoke methods one by one and display a message?

Question

How to invoke methods one by one and display a message in label control WPF?

 

I want to execute 3 methods one after another, a message should be shown in label control (eg: checking method1..) at the same time when we execute each method. How to do this in WPF Window.

Using Thread

The UI thread must not wait for worker threads to complete to show the window and the worker threads should execute one after another. For that purpose i have used join(), that made UI thread also waiting for worker threads to finish. How to do this?