Comma Delimited(Saperated) string of arraylist using LINQ Query

In this post, I will explain how to get Comma Delimited (Separated) string of ArrayList using LINQ Query.

In below example, I want a single string containing all elements from ArrayList with separation character comma(","). 

List<string> str = new List<string>(new string[]{"Harry", "Sandy", "John" , "Mahesh"});

Label1.Text = string.Join(", ", str);

ArrayList

Result Comma Separated String