How to switch between threads in c# .net to update GUI?

Question

PHP

I have a thread (not the main one) that is working with the treeView, so here's how I call the main thread to update the treeView I
read about delegates, invoke ... I can't figure it out without an example yet
Something like this:
....
Switched to main thread
{
treeView.items.add(item);
}
Working on the background thread....

Answer 1

Very much like a backdoor, especially considering this: and the fact that initially the arguments sent to the function are collected from the $_COOKIE, $_POST arrays, which can be sent by any user.

Answer 2

And what is there to disassemble? All name => value pairs are taken from cookies and post, the values ​​are converted from hexadecimal to binary notation, xed with a key, divided into substrings by # and, if the number of elements in the array turned out to be a multiple of three, then an attempt is made to execute the second element of the array with eval argument from the third.

Answer 3

Another such option:

this.Invoke(new Action(() =>
 {
    //  работа с treeView
}));

Answer 4

Do not throw pissing slippers on))
And apply only when you understand what you are doing
Control.CheckForIllegalCrossThreadCalls = False