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What's the recommended best practice for using IEqualityComparer<T>?

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What collection would use an IEqualityComparer T to enforce uniqueness?

Methods in HashSet Collection This method copies the elements of a HashSet<T> object to an array. This method returns an IEqualityComparer object. this object can be used for the equality testing of a HashSet<T> object.

What is IEqualityComparer C#?

IEqualityComparer<T> is a generic . NET interface that allows implementing customized equality comparison for collections. Creating a comparer class for your type is an alternative to creating Equals() and GetHashCode() methods for the type.

What is GetHashCode in IEqualityComparer?

GetHashCode. This method is used to generate an integer hash code for the single provided value or object. It is essential that the hash codes for two values that are deemed equal by the Equals method are the same. In some cases the method can return the hash code generated by the GetHashCode method of the argument.

I'm looking for real world best practices, how other people might have implemented solutions with complex domains.

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