Is it possible for 'this' keyword to equal null?

Question

In an example, my professor has implemented Equals as follows:

public class Person {
    private string dni;

    // ...

    public override bool Equals(object          


        

Answer 1

Yes, in some cases. The most common case is if you invoke an instance method using a delegate created by reflection and pass a null receiver. This will print "True":

public class Test
{
    public void Method()
    {
        Console.WriteLine(this == null);
    }
}

public class Program
{
    public static void Main(string[] args)
    {
        object t = new Test();
        var methodInfo = t.GetType().GetMethod("Method");
        var a = (Action)Delegate.CreateDelegate(typeof(Action), null, methodInfo);
        a();
    }
}

Honestly, though I've never seen someone actually check thisfor null in production code.