ReferenceEqualityComparer

By default the default implementation of Equals and GetHashCode for all .Net uses the object reference, but when you override both of the methods you get the default implementation lost.

i.e: Entity for example overrides it to use Type and Id for convenience when writing business logic.

ReferenceEqualityComparer allows you to change back this behavior in whatever data structure or algorithm that takes an IEqualityComparer.

public class ReferenceEqualityComparer<T> : IEqualityComparer<T>, IEqualityComparer where T : class
{
   public static ReferenceEqualityComparer<T> Default {get; }
}

Example:

var memoryGraph = new DirectedGraph<Modifiable>(ReferenceEqualityComparer<Modifiable>.Default);