using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var boolTestList1 = new List<bool> { true, true, true };

        var boolTestList2 = new List<bool> { false, false, true };

        var boolTestList3 = new List<bool> { false, true, true };

        var boolTestList4 = new List<bool> { false, false, false };

        Console.WriteLine("Using (e => e)");

        Console.WriteLine($"All true?: {boolTestList1.All(e => e)}");

        Console.WriteLine($"All true?: {boolTestList2.All(e => e)}");

        Console.WriteLine($"All true?: {boolTestList3.All(e => e)}");

        Console.WriteLine($"All true?: {boolTestList4.All(e => e)}\n");

        Console.WriteLine("Using (e => e = true)");

        Console.WriteLine($"All true?: {boolTestList1.All(e => e == true)}");

        Console.WriteLine($"All true?: {boolTestList2.All(e => e == true)}");

        Console.WriteLine($"All true?: {boolTestList3.All(e => e == true)}");

        Console.WriteLine($"All true?: {boolTestList4.All(e => e == true)}");

    }

}

​