#if FAT using System; using System.Collections.Generic; namespace LinqInternal.Collections { internal partial class ProgressiveSet : IExtendedReadOnlySet, IExtendedSet { IReadOnlySet IExtendedSet.AsReadOnly { get { return this; } } bool IExtendedSet.Add(T item) { throw new NotSupportedException(); } bool IExtendedSet.Remove(T item, IEqualityComparer comparer) { throw new NotSupportedException(); } } } #endif