Manipulate gui-elements from another thread - Common way to do this? [duplicate]

Question

This question already has answers here:

How do I update the GUI from another thread? (47 answers)

Closed 8 years ago.

I've been looking a lot of sites about "manipulate gui-elements from another thread" and each solution i found was (or looks) completely different than the others... Some solutions were 1-3 lines long and other solutions were 50+ lines long.

Here for example i have 2 different and small working solutions for this. My question is: Which of them is the common solution?

Both of this code-snippets are called from another thread (not the gui-thread).

// Solution 1.)
    frame.rtbChatbox.Invoke(new Action(() => frame.rtbChatbox.AppendText("\n" + line)));

// Solution 2.) 
    frame.rtbChatbox.Invoke((Action)delegate {
       frame.rtbChatbox.AppendText("\n" + line);
    });

Answer 1

The two solutions listed are functionally equivalent. They are two different syntaxes which are each used to create an anonymous method.

Use whichever one you want.