program439457.cs

using System;
using System.Collections.Generic;

public class Program
{
	public static void Main()
	{
		// This is based on an old test from Mono
		Console.WriteLine("Hello World");
		var trio = new SortedSet<int> { 0, 1, 2 };
		var digits = new SortedSet<int> { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
		var nonTrio = digits.GetViewBetween(3, 5);
		// Iterating the result of GetViewBetween does not change the problem
		// This shows that GetViewBetween succeeds and can be iterated fully
		Console.WriteLine("Iterating:");
		foreach(var x in nonTrio)
		{
			Console.WriteLine(x);
		}
		Console.WriteLine("IsSubSetOf:");
		// ArgumentOutOfRangeException (parameter name: lowerValue)
		// Expected: false
		Console.WriteLine(trio.IsSubsetOf((IEnumerable<int>)nonTrio));
	}
}