public void RemoveElementInMiddleOfRange()
		{
			// Arrange
			var sut = new OrderedRangedSet<int>();
			int v1 = 123;
			int v2 = v1 + 1;
			int v3 = v2 + 1;
			sut.Add(v1);
			sut.Add(v2);
			sut.Add(v3);

			// Act
			sut.Remove(v2);

			// Assert
			Assert.That(sut.IsEmpty, Is.False);
			Assert.That(sut.Count, Is.EqualTo(2));
			Assert.That(sut, Is.EquivalentTo(new [] { v1, v3 }));
			Assert.That(sut.Contains(v1), Is.True);
			Assert.That(sut.Contains(v2), Is.False);
			Assert.That(sut.Contains(v3), Is.True);
			Assert.That(sut.GetRanges(), Is.EquivalentTo(new []{ new Interval<int>(v1, v1 + 1), new Interval<int>(v3, v3 + 1) }));
		}
		public void RemoveStandAloneElement()
		{
			// Arrange
			var sut = new OrderedRangedSet<int>();
			int[] arr = new [] { 1234, 123, 456, 5678, 789 };
			foreach(int v in arr) sut.Add(v);

			// Act
			sut.Remove(arr[2]);

			// Assert
			Assert.That(sut.IsEmpty, Is.False);
			Assert.That(sut.Count, Is.EqualTo(arr.Length - 1));
			Assert.That(sut, Is.EquivalentTo(arr.Where(i => i != arr[2]).OrderBy(i => i)));
			foreach(int v in arr.Where(i => i != arr[2]))
				Assert.That(sut.Contains(v), Is.True);
			Assert.That(sut.GetRanges(), Is.EquivalentTo(arr.Where(i => i != arr[2]).Select(i => new Interval<int>(i, i + 1))));
		}