You can not overload the == operator, but you can override equals(Object) if you want it to behave differently from the == operator, i.e. not compare references but actually compare the objects (e.g. using all or some of their fields). Also, if you do override equals(Object), have a look at hashCode() as well. These two … Read more
Just in case there is no default implementation, this is my own: Edit by 280Z28: Rationale for using RuntimeHelpers.GetHashCode(object), which many of you probably haven’t seen before. 🙂 This method has two effects that make it the correct call for this implementation: It returns 0 when the object is null. Since ReferenceEquals works for null … Read more
You may also understand the difference between null and an empty string this way: Original image by R. Sato (@raysato)