Import YamlDotNet.

Assets/YamlDotNet/Helpers/IOrderedDictionary.cs

@@ -0,0 +1,55 @@
+// This file is part of YamlDotNet - A .NET library for YAML.
+// Copyright (c) Antoine Aubry and contributors
+//
+// 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.
+
+using System.Collections.Generic;
+
+namespace YamlDotNet.Helpers
+{
+    public interface IOrderedDictionary<TKey, TValue> : IDictionary<TKey, TValue>
+        where TKey : notnull
+    {
+        /// <summary>
+        /// Gets or sets the element with the specified index.
+        /// </summary>
+        /// <param name="index">The index of the element to get or set.</param>
+        /// <returns>The element with the specified index.</returns>
+        KeyValuePair<TKey, TValue> this[int index]
+        {
+            get;
+            set;
+        }
+
+        /// <summary>
+        /// Adds an element with the provided key and value to the <see cref="IOrderedDictionary{TKey, TValue}"/>
+        /// at the given index.
+        /// </summary>
+        /// <param name="index">The zero-based index at which the item should be inserted.</param>
+        /// <param name="key">The object to use as the key of the element to add.</param>
+        /// <param name="value">The object to use as the value of the element to add.</param>
+        void Insert(int index, TKey key, TValue value);
+
+        /// <summary>
+        /// Removes the element at the specified index.
+        /// </summary>
+        /// <param name="index">The zero-based index of the element to remove.</param>
+        void RemoveAt(int index);
+    }
+}