How do I replace part of a string in C#?

Question

Supposed I have the following string:

string str = \"text\";

And I would like to change \'tag\' to \'newTag\' so the

Answer 1

Why use regex when you can do:

string newstr = str.Replace("tag", "newtag");

or

string newstr = str.Replace("","").Replace("","");

Edited to @RaYell's comment