Why use "RootEntityName" compare, not use "EntityName" in NHibernate/Engine /EntityKey.Equals0

[Lio98]

NHibernate.Engine.EntityKey.cs

		public bool Equals(EntityKey other)
		{
			if (other == null)
			{
				return false;
			}

			return
				other.RootEntityName.Equals(RootEntityName)
				&& _persister.IdentifierType.IsEqual(other.Identifier, Identifier, _persister.Factory);
		}

[fredericDelaporte]

Because that is the right thing to do.

nhibernate-core/src/NHibernate/Persister/Entity/IEntityPersister.cs

Lines 36 to 40 in 07c367f

	/// <summary>
	/// Returns an object that identifies the space in which identifiers of
	/// this entity hierarchy are unique.
	/// </summary>
	string RootEntityName { get; }

Why should we use the EntityName? In case we have a key from a proxy of a base class, we would no more be able to infer that the key points the same entity than a key of the entity loaded from its concrete type.