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List<T> implements the following interfaces:

IList<T>
ICollection<T>
IList
ICollection
IReadOnlyList<T>
IReadOnlyCollection<T>
IEnumerable<T>
IEnumerable

None of them has AddRange().

Which interface does AddRange() belong to in List<T>?

user366312
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    [`AddRange`](https://learn.microsoft.com/en-us/dotnet/api/system.collections.generic.list-1.addrange?view=netcore-3.1) doesn't implement any interface method and belongs to `List` itself – Pavel Anikhouski Jun 20 '20 at 18:03

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