string.Join on a List or other type

Question

I want to turn an array or list of ints into a comma delimited string, like this:

string myFunction(List a) {
    return string.Join(\",\", a);
}
         


        

Answer 1

Had a similar Extension Method that I modified to this

public static class MyExtensions
{
    public static string Join(this List<int> a, string splitChar)
    {
        return string.Join(splitChar, a.Select(n => n.ToString()).ToArray());
    }
}

and you use it like this

var test = new List<int>() { 1, 2, 3, 4, 5 };
string s = test.Join(",");

.NET 3.5