Thread-safe updates of a WinForm control from other classes

Question

Could someone please help me with the following problem:

There are two classes MainForm and LWriter. Below is a method from the LWriter that in addition to writing

Answer 1

As suggested by Sonu, delegate can be used for Thread safe calls, and you can use Linq to shorten the code:

this.BeginInvoke( (Action) delegate ()
{
       //code to update UI
});

See this link for more information.