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using System;
using System.Collections.Generic;
using System.Collections.Specialized;
// From http://www.codeproject.com/KB/recipes/GenericOrderedDictionary.aspx
namespace NW4RTools.Util
{
/// <summary>
/// Represents a generic collection of key/value pairs that are ordered independently of the key and value.
/// </summary>
/// <typeparam name="TKey">The type of the keys in the dictionary</typeparam>
/// <typeparam name="TValue">The type of the values in the dictionary</typeparam>
public interface IOrderedDictionary<TKey, TValue> : IOrderedDictionary, IDictionary<TKey, TValue>
{
/// <summary>
/// Adds an entry with the specified key and value into the <see cref="IOrderedDictionary{TKey,TValue}">IOrderedDictionary<TKey,TValue></see> collection with the lowest available index.
/// </summary>
/// <param name="key">The key of the entry to add.</param>
/// <param name="value">The value of the entry to add.</param>
/// <returns>The index of the newly added entry</returns>
/// <remarks>
/// <para>You can also use the <see cref="P:System.Collections.Generic.IDictionary{TKey,TValue}.Item(TKey)"/> property to add new elements by setting the value of a key that does not exist in the <see cref="IOrderedDictionary{TKey,TValue}">IOrderedDictionary<TKey,TValue></see> collection; however, if the specified key already exists in the <see cref="IOrderedDictionary{TKey,TValue}">IOrderedDictionary<TKey,TValue></see>, setting the <see cref="P:Item(TKey)"/> property overwrites the old value. In contrast, the <see cref="M:Add"/> method does not modify existing elements.</para></remarks>
/// <exception cref="ArgumentException">An element with the same key already exists in the <see cref="IOrderedDictionary{TKey,TValue}">IOrderedDictionary<TKey,TValue></see></exception>
/// <exception cref="NotSupportedException">The <see cref="IOrderedDictionary{TKey,TValue}">IOrderedDictionary<TKey,TValue></see> is read-only.<br/>
/// -or-<br/>
/// The <see cref="IOrderedDictionary{TKey,TValue}">IOrderedDictionary<TKey,TValue></see> has a fized size.</exception>
new int Add(TKey key, TValue value);
/// <summary>
/// Inserts a new entry into the <see cref="IOrderedDictionary{TKey,TValue}">IOrderedDictionary<TKey,TValue></see> collection with the specified key and value at the specified index.
/// </summary>
/// <param name="index">The zero-based index at which the element should be inserted.</param>
/// <param name="key">The key of the entry to add.</param>
/// <param name="value">The value of the entry to add. The value can be <null/> if the type of the values in the dictionary is a reference type.</param>
/// <exception cref="ArgumentOutOfRangeException"><paramref name="index"/> is less than 0.<br/>
/// -or-<br/>
/// <paramref name="index"/> is greater than <see cref="System.Collections.ICollection.Count"/>.</exception>
/// <exception cref="ArgumentException">An element with the same key already exists in the <see cref="IOrderedDictionary{TKey,TValue}">IOrderedDictionary<TKey,TValue></see>.</exception>
/// <exception cref="NotSupportedException">The <see cref="IOrderedDictionary{TKey,TValue}">IOrderedDictionary<TKey,TValue></see> is read-only.<br/>
/// -or-<br/>
/// The <see cref="IOrderedDictionary{TKey,TValue}">IOrderedDictionary<TKey,TValue></see> has a fized size.</exception>
void Insert(int index, TKey key, TValue value);
/// <summary>
/// Gets or sets the value at the specified index.
/// </summary>
/// <param name="index">The zero-based index of the value to get or set.</param>
/// <value>The value of the item at the specified index.</value>
/// <exception cref="ArgumentOutOfRangeException"><paramref name="index"/> is less than 0.<br/>
/// -or-<br/>
/// <paramref name="index"/> is equal to or greater than <see cref="System.Collections.ICollection.Count"/>.</exception>
new TValue this[int index]
{
get;
set;
}
TKey GetKeyForIndex(int index);
TKey GetKeyForValue(TValue value);
int GetIndexForValue(TValue value);
}
}
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