new Collection()
using System; using System.Collections.Generic; using System.Collections.ObjectModel; class MainClass { static void Main() { Collection<int> numbers = new Collection<int>(); numbers.Add( 2 ); numbers.Add( 9 ); Collection<string> strings = new Collection<string>(); strings.Add( "J" ); strings.Add( "B" ); Collection< Collection<int> > colNumbers = new Collection<Collection<int>>(); colNumbers.Add( numbers ); IList<int> theNumbers = numbers; foreach( int i in theNumbers ) { Console.WriteLine( i ); } } }