Question

What is the functional programming approach to convert an IEnumerable<string> to a delimited string? I know I can use a loop, but I’m trying to wrap my head around functional programming.

Here’s my example:

var selectedValues = from ListItem item in checkboxList.Items where item.Selected select item.Value;  var delimitedString = ?? 

.. or could I do this in just the first var assignment (append each result to the previous)?

Answer 1

var delimitedString = selectedValues.Aggregate((x,y) => x + ', ' + y);