ICollection - Get single value

Question

What is the best way to get a value from a ICollection? We know the Collection is empty apart from that.

Answer 1

Without generics and because ICollection implements IEnumerable you can do like in example 1. With generics you simple need to do like example 2:

List l = new List();
l.Add("astring");

ICollection col1 = (ICollection)l;
ICollection col2 = (ICollection)l;

//example 1
IEnumerator e1 = col1.GetEnumerator();
if (e1.MoveNext())
    Console.WriteLine(e1.Current);

//example 2
if (col2.Count != 0)
    Console.WriteLine(col2.Single());