I have done Minor changes in my answer string str = "abc, d.e f,g h,i. j,k"; string[] arr = str.Split(',', '.'); // remove all , and . str = string.Empty; // Changes here foreach (string str1 in arr) { str += str1; } Console.WriteLine(str); //output abc de fg hi jk

Unless of course he doesn't remember that email address and can't log into it to check for the Code Project email, but if he knew the email address he could have that email provider email his alternate email address the password for the email account used with Code Project. :) Still, giving somebody the email address associated with an account would be a breach of security, so I'd say the guy is just screwed if the above scenario is the case. [Forum Guidelines]