mono/mcs/class/referencesource/System.ServiceModel.Internals/System/Runtime/ReadOnlyKeyedCollection.cs

//-----------------------------------------------------------------------------
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------------------------

namespace System.Runtime
{
    using System.Collections.ObjectModel;

    class ReadOnlyKeyedCollection<TKey, TValue> : ReadOnlyCollection<TValue>
    {
        KeyedCollection<TKey, TValue> innerCollection;

        public ReadOnlyKeyedCollection(KeyedCollection<TKey, TValue> innerCollection)
            : base(innerCollection)
        {
            Fx.Assert(innerCollection != null, "innerCollection should not be null");
            this.innerCollection = innerCollection;
        }

        public TValue this[TKey key]
        {
            get
            {
                return this.innerCollection[key];
            }
        }
    }

}