IEqualityComparer 相当于 (=) 运算符
是否公开了与相等 (=) 运算符具有相同行为的 IEqualityComparer？ LanguagePrimitives 模块包含以下几个：FastGenericEqualityComparer、GenericEqualityComparer、GenericEqualityERComparer。也许还有其他人？
Is an IEqualityComparer exposed that has the same behavior as the equality (=) operator? The LanguagePrimitives module contains a few: FastGenericEqualityComparer, GenericEqualityComparer, GenericEqualityERComparer. Maybe there are others as well?
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深入研究 Reflector 后，它看起来像
FastGenericEqualityComparer就是其中之一。它和 (=) 运算符两者都调用HashCompare.GenericEqualityIntrinsic<'T>。编辑
[`HashIdentity.Structural`](https://fsharp.github.io/fsharp-core-docs/reference/fsharp-collections-hashidentity.html#Structural) also forwards to `HashCompare.GenericEqualityIntrinsic`.
After digging through Reflector a bit more, it looks like
FastGenericEqualityCompareris the one. It and the (=) operator both callHashCompare.GenericEqualityIntrinsic<'T>.EDIT
[`HashIdentity.Structural`](https://fsharp.github.io/fsharp-core-docs/reference/fsharp-collections-hashidentity.html#Structural) also forwards to `HashCompare.GenericEqualityIntrinsic`.