how do i change " in c#

I’m trying to change a piece of text from href=“#” to href=NO DATA
heres my code

                    string text1 = File.ReadAllText(fname);
                    text1 = text1.Replace("&#", "£");
                    File.WriteAllText(fname, text1);
                    string text2 = File.ReadAllText(fname);
                    text2 = text2.Replace("href="#"", "<NNN>NO DATA<AAA>");
                    File.WriteAllText(fname, text2);

it just wont work, what do I need to do

text2 = text2.Replace(‘href=“#”’, “NO DATA”);

" and ’ both can be used to define a string