List test = new List(); test.Add(\"test\'s\"); test.Add(\"test\"); test.Add(\"test\'s more\"); string s = string.Format(\"\'{0}\'\", string.J
Try this:
string s = string.Join(",", test.Select(x => string.Format("'{0}'", x.Replace("'", "''"))));
By the way, there's no apostrophe in "tests" - apostrophes aren't used for plurals.