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C#

New System.HashCode Struct in Dotnet Core 2.1

Not a question, but a quick way to implement your GetHashCode method is to use the System.HashCode.Combine method introduced in Dotnet Core 2.1.

You can pass it up to 8 values (in this case, the properties X and Y).

public override int GetHashCode() => HashCode.Combine(X, Y);

Note that this won't work in Workspaces, as they use Mono.