this == null inside .NET instance method - why is that possible?

Question

I\'ve always thought that it\'s impossible for this to be null inside instance method body. Following simple program demonstrates that it is possible. Is this s

Answer 1

this is a readonly reference in C# classes. Accordingly and as expected this can be used like any other references (in read only mode) ...

this == null // readonly - possible
this = new this() // write - not possible