Is the Equals method overridden correctly in C#?

Question

.NET

The Microsoft site provides an example of how to override the Equals method.

Confusingly, there is no this.GetType() != other.GetType() check, as is usually given in examples.
Do you think this is correct?

Answer 1

In this case, the implementation is correct, but it may behave incorrectly if you create a descendant of ImaginaryNumber.
So in a good way it is necessary to check the types through GetType, which you noticed.
GetHashCode, by the way, is now recommended to be implemented through the HashCode structure

Answer 2

When it is cast from an object there and the type is checked