Real-world examples where C# 'out' parameters are useful?

Question

I\'m reading up on core C# programming constructs and having a hard time wrapping my head around the out parameter modifier. I know what it does by reading but

Answer 1

//out key word is used in function instead of return. we can use multiple parameters by using out key word
public void outKeyword(out string Firstname, out string SecondName)
{
    Firstname = "Muhammad";
    SecondName = "Ismail";

}
//on button click Event
protected void btnOutKeyword_Click(object sender, EventArgs e)
{
    string first, second;
    outKeyword(out first, out second);
    lblOutKeyword.Text = first + "  " + second;
}