Double quote string replace in C#

Question

How to replace the below string in C#

Current:

\"John K \"GEN\" Greg\"

The Goal:

 \"John K \\\"GEN\\\" Greg\"
         


        

Answer 1

string MailFrom ="aaa@my.web.pk;\"PROMMS\" ccc@my.web.pk;";

string NewMailFrom = Regex.Replace(MailFrom, "\"[^\"]*\"", string.Empty);


Results

aaa@my.web.pk;ccc@my.web.pk;