Check overlap in date ranges

DatesTest.cs

using System;
using System.Collections.Generic;

public class Program
{
	public static void Main()
	{
		var init = new { from = new DateTime(2020, 5, 10), to = new DateTime(2020, 5, 20)};
		
		var x = new List<(DateTime StartsOn, DateTime EndsOn, Boolean expected)>() {
				{(new DateTime(2020, 4, 20), new DateTime(2020, 4, 25), false)}, //Before
			 	{(new DateTime(2020, 5, 22), new DateTime(2020, 10, 28), false)}, //After
			 	{(new DateTime(2020, 5, 12), new DateTime(2020, 5, 18), true)}, //Between
			 	{(new DateTime(2020, 5, 8), new DateTime(2020, 5, 12), true)}, //FirstFew
			 	{(new DateTime(2020, 5, 18), new DateTime(2020, 5, 22), true)}, //LastFew            
			};
		
		foreach (var d in x)
		{
			var actual = d.StartsOn <= init.to && d.EndsOn >= init.from;
			Console.WriteLine($"{(actual != d.expected ? '❌' : '✅')} {actual} should be {d.expected} ");
		}
	}
}