Using LINQ to convert a list to a CSV string

Question

I have a list of integers and I want to be able to convert this to a string where each number is separated by a comma.

So far example if my list was:

1 2 3 4 5 

My expected output would be:

1, 2, 3, 4, 5 

Is this possible using LINQ?

Thanks

Answer 1

In .NET 2/3

var csv = string.Join( ", ", list.Select( i => i.ToString() ).ToArray() ); 

or (in .NET 4.0)

var csv = string.Join( ", ", list ); 

Answer 2

Is this what you’re looking for?

// Can be int[], List<int>, IEnumerable<int>, ... int[] myIntegerList = ...;  string myCSV = string.Join(", ", myIntegerList.Select(i => i.ToString()).ToArray()); 

Starting with C# 4.0, the extra mumbojumbo is no longer necessary, it all works automatically:

// Can be int[], List<int>, IEnumerable<int>, ... int[] myIntegerList = ...;  string myCSV = string.Join(", ", myIntegerList);