How to create a comma separated string from List

Here is a sample code which shows how to create a comma separated string from List<string>. I know this is not a big deal to do this but in some circumstances it can be used to resolved complex problems.

    List<string> lstStr = new List<string>();
    lstStr.Add("item1");
    lstStr.Add("item2");
    lstStr.Add("item3");
    lstStr.Add("item4");
    lstStr.Add("item5");
    lstStr.Add("item6");

    string str = string.Join(",", lstStr);
    MessageBox.Show(str);

Output of this code will be as;

item1,item2,item3,item4,item5,item6

Now you can manipulate this comma separated string as per your needs.