Removing extra commas from string after using String.Join to convert array to string (C#)

Question

I\'m converting an array into a string using String.Join. A small issue I have is that, in the array some index positions will be blank. An example is below:

Answer 1

string.Join(",", Array.FindAll(array, a => !String.IsNullOrEmpty(a)));

How about this one? Cons and pros comparing to LINQ solution? At least it shorter.