Question

How can I write a LINQ expression (or anything else) that selects an item from a List and join them together?

Example

IList<string> data = new List<string>();

data.Add("MyData1");
data.Add("MyData2");

string result = // Some LINQ query... I try data.Select(x => x + ",");

//result = "MyData1, MyData2"

Answer 1

Just go with (String.Join Method):

string joined = String.Join(",", data.ToArray());

But if it has to be LINQ, you could try:

string joinedLinq = data.Aggregate((i, j) => i + "," + j);