Question

I’ve used this in the past to build comma seperated lists:

var list = new List<int>{1,2,3};
var retVal = list.Select(i=>i.ToString()).Aggregate((a,b) => a+", "+b);

Works great.

I’m trying to do the same sort of thing to ‘wrap’ each element as an xml node.

Something like:

Aggregate((a, b) => string.Format("<ID>{0}</ID><ID>{1}</ID>", a,b))

Can’t quite seem to make it work though. Is it possible? Or is there an easier way entirely?

Thanks.

Answer 1

Shouldn’t it be like:

Aggregate((a, b) => string.Format("{0}<ID>{1}</ID>", a,b))

You’re adding to a new nodes.