C# Nullable Equality Operations, Why does null <= null resolve as false? [duplicate]

Answer 1

This is because the compiler is smart enough to figure out that >= null will always be false and replaces your expression with a constant value of false.

Check out this example:

using System;

class Example
{
    static void Main()
    {
        int? i = null;

        Console.WriteLine(i >= null);
        Console.WriteLine(i == null);
    }
}

This compiles down to the following code:

class Example
{
    private static void Main()
    {
        int? i = new int?();
        Console.WriteLine(false);
        Console.WriteLine(!i.HasValue);
    }
}