C# \n won't break to a new line

I’ve been looking around on how to get a long string to break to a new line and I came across
but however everything after
doesn’t display can I get some help? Thanks in advance.

    void OnGUI() {
    GUI.Label(new Rect(10, 10, 100, 20), "line one 

line two");
}

Your Rect height is too small to display all lines.

try this instead :

void OnGUI() {
   GUI.Label(new Rect(10, 10, 100, 40), "line one 

line two");
}

In the Inpector you can set the Text’s Vertical Overflow property to overflow .
If it is set to truncate it wont worked for me.