This library offers three implementations of IEqualityComparer<T>:
ListEqualityComparer<T>BagEqualityComparer<T>SetEqualityComparer<T>
These represent three different strategies by which IEnumerable<T> objects may be compared for equality.
Two enumerable objects are equal using the list equality strategy if:
- All items in both compared objects are equal
- All items in A must be present in B, and vice-versa
- Any duplicated items are present in the same quantity in both objects
- The order of the items is the same across both compared objects
Two enumerable objects are equal using the bag equality strategy if:
- All items in both compared objects are equal
- All items in A must be present in B, and vice-versa
- Any duplicated items are present in the same quantity in both objects
- The order of the items is irrelevant
Two enumerable objects are equal using the set equality strategy if:
- All items in both compared objects are equal
- All items in A must be present in B, and vice-versa
- Duplicated items are irrelevant
- An item may appear in one object many times but in the other only once and the collections would still be considered equal
- The order of the items is irrelevant