Assuming this != null when implementing IComparable<T>

Question

I have an object of type T which implements IComparable<T>. Is it okay when implementing bool Equals (T obj) to ommit the check if (ReferenceEquals(this, null)) { DoSomething() }? Can I assume that since the function could be called this is already not null?

Thank you very much.

Answer 1

Yes you can assume that if the function has been called on an object, then that object is not null.

Answer 2

You should always assume this != null, because C# guarantees it.