Newtonsoft.Json/Serialization/JsonPropertyCollection.cs

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#region License
// Copyright (c) 2007 James Newton-King
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
#endregion

using System;
using System.Collections.Generic;
using System.Text;
using System.Collections.ObjectModel;
using Newtonsoft.Json.Utilities;
using System.Globalization;

namespace Newtonsoft.Json.Serialization
{
    /// <summary>
    /// A collection of <see cref="JsonProperty"/> objects.
    /// </summary>
    public class JsonPropertyCollection : KeyedCollection<string, JsonProperty>
    {
        private readonly Type _type;

        /// <summary>
        /// Initializes a new instance of the <see cref="JsonPropertyCollection"/> class.
        /// </summary>
        /// <param name="type">The type.</param>
        public JsonPropertyCollection(Type type)
            : base(StringComparer.Ordinal)
        {
            ValidationUtils.ArgumentNotNull(type, "type");
            _type = type;
        }

        /// <summary>
        /// When implemented in a derived class, extracts the key from the specified element.
        /// </summary>
        /// <param name="item">The element from which to extract the key.</param>
        /// <returns>The key for the specified element.</returns>
        protected override string GetKeyForItem(JsonProperty item)
        {
            return item.PropertyName;