tl;dr Let Visual Studio generate your overrides for Equals() and GetHashCode() so you don’t need to remember the best practices. Don’t roll your own GetHashCode() algorithm or even rely on StackOverflow, use the .net framework to work it out for you.. HashCode.Combine(Long, Lat, Altitude); Background When trying to check the equality of reference objects in c# we simply cannot apply the ‘==’ operator, as this will only compare memory locations and not data.