List<long> to comma delimited string in C#

This often comes up. I have a List and I want to go to a comma delimited string of all the elements in the list that I can use in SQL.

What is the most elegant way to do this in C#? Iterating over all of them is fine, except either the first or last element has to be special-cased since I don't want leading or trailing commas.

Got a good one-liner?


string.Join is your friend...

var list = new List<long> {1, 2, 3, 4};
var commaSeparated = string.Join(",", list);

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