IsSupersetOf()

bool System.Collections.Generic.HashSet< T >.IsSupersetOf ( IEnumerable< T > other )

inline

Implements System.Collections.Generic.ISet< T >.

Definition at line 604 of file HashSet.cs.

    {
        if (other == null)
        {
            ThrowHelper.ThrowArgumentNullException(ExceptionArgument.other);
        }
        if (other == this)
        {
            return true;
        }
        if (other is ICollection<T> collection)
        {
            if (collection.Count == 0)
            {
                return true;
            }
            if (other is HashSet<T> hashSet && EqualityComparersAreEqual(this, hashSet) && hashSet.Count > Count)
            {
                return false;
            }
        }
        return ContainsAllElements(other);
    }

References System.collection, System.Collections.Generic.HashSet< T >.ContainsAllElements(), System.Collections.Generic.Dictionary< TKey, TValue >.Count, System.Collections.Generic.HashSet< T >.Count, System.Collections.Generic.HashSet< T >.EqualityComparersAreEqual(), System.other, and System.ThrowHelper.ThrowArgumentNullException().