Difference between BeginInvoke and Thread.Start

Question

I have a dialog based application in which I will delegating the I/O operation read write to different thread.

I just want to clear is there any difference between two approaches..

First approach: ( I am doing this in ,my main form -Form.cs)

delegate void Action(); Action _action = new Action(Method); this.BeginInvoke(_action); 

Second approach:

Thread th = new  Thread( new ThreadStart(_action)); th.Start(); 

I noticed that BeginInvoke hangs the UI for a second while second approach don't ..

Please help

Answer 1

BeginInvoke will post the action in the message queue of the message pump on the same thread as the Form, it will not create a new thread.

Control.BeginInvoke behaves similar to an asynchronous thread start, but has important internal differences.

Read in further detail an article here.

Answer 2

BeginInvokes executes the delegate asynchronously on the UI thread (which is why it hangs the UI), by posting a message to the window. That's what you need to do if the code in the delegate accesses the UI.

The approach with Thread.Start executes the delegates on a new, independant thread.