IEnumerable to string

Question

I have a DataTable that returns

IDs
,1
,2
,3
,4
,5
,100
,101

I want to convert this to single string value, i.e:

,1,2,3,4,5,100         


        

Answer 1

You can cheat with this:

String output = "";
_tbl.AsEnumerable().Select(x => output += x).ToArray(); 
// output now contains concatenated string

Note ToArray() or similar is needed to force the query to execute.

Another option is

String output = String.Concat(_tbl.AsEnumerable().Select(x=>x).ToArray());