class Program
{
	static void Main(string[] args)
	{
		List<TestClass> test_array = new List<TestClass>();

		test_array.Add(new TestClass(1, 10));
		test_array.Add(new TestClass(11, 20));
		test_array.Add(new TestClass(30, 50));
		test_array.Add(new TestClass(60, 100));

		var acc = GetRange(test_array[0])
			.Select(n => Enumerable.Repeat(n, 1));

		foreach (var testClass in test_array.Skip(1))
		{
			acc = acc.SelectMany(n => GetRange(testClass), (n, p) => n.Concat(Enumerable.Repeat(p, 1)));
		}

		foreach (var ints in acc)
		{
			Console.WriteLine(string.Join(',', ints));
		}

		Console.ReadKey();
	}

	static IEnumerable<int> GetRange(TestClass testClass) => Enumerable.Range(testClass.MinValue, testClass.MaxValue - testClass.MinValue + 1);
}

public class TestClass
{
	public int MinValue { get; set; }
	public int MaxValue { get; set; }
	public TestClass(int min_value, int max_value)
	{
		this.MinValue = min_value;
		this.MaxValue = max_value;
	}
}