C# string replace

Try this:

line.Replace("\",\"", ";")

The simplest way is to do

line.Replace(@",", @";");

Output is shown as below:

You need to escape the double-quotes inside the search string, like this:

string orig = "\"Text\",\"Text\",\"Text\"";
string res = orig.Replace("\",\"", ";");

Note that the replacement does not occur "in place", because .NET strings are immutable. The original string will remain the same after the call; only the returned string res will have the replacements.