Why must we define both == and != in C#?

Question

The C# compiler requires that whenever a custom type defines operator ==, it must also define != (see here).

Why?

I\'m curious to k

Answer 1

Probably just something they didn't think of of didn't have time to do.

I always use your method when I overload ==. Then I just use it in the other one.

You're right, with a small amount of work, the compiler could give this to us for free.