HashSet<Point> is slower than HashSet<String>

[ericwood8]

Summary
Fix the Point datatype to be one of the generics throughout all generics in C#.

Motivation
GOAL 1- Performance.
GOAL 2- Less code by developer.

Planning:

1. Point needs to be considered one of the generics. So check not only HashSet but other things you can set to generics.
2. PointComparer : IEqualityComparer needs a good Equals() and GetHashCode()

Suggested reading:
https://stackoverflow.com/questions/46142734/why-is-hashsetpoint-so-much-slower-than-hashsetstring

[CyrusNajmabadi]

This is not a language concern. This is a runtime concern.

[koszeggy]

That SO question is quite outdated. Starting with .NET Core 2.0 Point implements the IEquatable<T> interface.