/// <overloads>
		/// Adds a range of elements to the end of the <see cref="TrackCollection"/>.
		/// </overloads>
		/// <summary>
		/// Adds the elements of another collection to the end of the <see cref="TrackCollection"/>.
		/// </summary>
		/// <param name="collection">The <see cref="TrackCollection"/> whose elements
		/// should be added to the end of the current collection.</param>
		/// <exception cref="ArgumentNullException">
		/// <paramref name="collection"/> is a null reference.</exception>
		/// <exception cref="NotSupportedException">
		/// <para>The <see cref="TrackCollection"/> is read-only.</para>
		/// <para>-or-</para>
		/// <para>The <b>TrackCollection</b> has a fixed size.</para>
		/// <para>-or-</para>
		/// <para>The <b>TrackCollection</b> already contains one or more elements
		/// in the specified <paramref name="collection"/>, and the <b>TrackCollection</b>
		/// ensures that all elements are unique.</para></exception>
		/// <remarks>Please refer to <see cref="ArrayList.AddRange"/> for details.</remarks>

		public virtual void AddRange(TrackCollection collection)
		{
			if (collection == null)
				throw new ArgumentNullException("collection");

			if (collection.Count == 0) return;
			if (this._count + collection.Count > this._array.Length)
				EnsureCapacity(this._count + collection.Count);

			++this._version;
			Array.Copy(collection.InnerArray, 0,
				this._array, this._count, collection.Count);
			this._count += collection.Count;
		}
		/// <summary>
		/// Creates a shallow copy of the <see cref="TrackCollection"/>.
		/// </summary>
		/// <returns>A shallow copy of the <see cref="TrackCollection"/>.</returns>
		/// <remarks>Please refer to <see cref="ArrayList.Clone"/> for details.</remarks>

		public virtual object Clone()
		{
			TrackCollection collection = new TrackCollection(this._count);

			Array.Copy(this._array, 0, collection._array, 0, this._count);
			collection._count = this._count;
			collection._version = this._version;

			return collection;
		}
			public override void AddRange(TrackCollection collection)
			{
				foreach (Track value in collection)
					CheckUnique(value);

				this._collection.AddRange(collection);
			}
		/// <summary>
		/// Initializes a new instance of the <see cref="TrackCollection"/> class
		/// that contains elements copied from the specified collection and
		/// that has the same initial capacity as the number of elements copied.
		/// </summary>
		/// <param name="collection">The <see cref="TrackCollection"/>
		/// whose elements are copied to the new collection.</param>
		/// <exception cref="ArgumentNullException">
		/// <paramref name="collection"/> is a null reference.</exception>
		/// <remarks>Please refer to <see cref="ArrayList(ICollection)"/> for details.</remarks>

		public TrackCollection(TrackCollection collection)
		{
			if (collection == null)
				throw new ArgumentNullException("collection");

			this._array = new Track[collection.Count];
			AddRange(collection);
		}
			public override void AddRange(TrackCollection collection)
			{
				lock (this._root) this._collection.AddRange(collection);
			}
			internal UniqueList(TrackCollection collection)
				:
				base(Tag.Default)
			{
				this._collection = collection;
			}
			public override void AddRange(TrackCollection collection)
			{
				throw new NotSupportedException(
					"Read-only collections cannot be modified.");
			}
			internal SyncList(TrackCollection collection)
				:
				base(Tag.Default)
			{

				this._root = collection.SyncRoot;
				this._collection = collection;
			}
			internal ReadOnlyList(TrackCollection collection)
				:
				base(Tag.Default)
			{
				this._collection = collection;
			}
			internal Enumerator(TrackCollection collection)
			{
				this._collection = collection;
				this._version = collection._version;
				this._index = -1;
			}
		/// <summary>
		/// Returns a wrapper for the specified <see cref="TrackCollection"/>
		/// ensuring that all elements are unique.
		/// </summary>
		/// <param name="collection">The <see cref="TrackCollection"/> to wrap.</param>    
		/// <returns>
		/// A wrapper around <paramref name="collection"/> ensuring that all elements are unique.
		/// </returns>
		/// <exception cref="ArgumentException">
		/// <paramref name="collection"/> contains duplicate elements.</exception>
		/// <exception cref="ArgumentNullException">
		/// <paramref name="collection"/> is a null reference.</exception>
		/// <remarks><para>
		/// The <b>Unique</b> wrapper provides a set-like collection by ensuring
		/// that all elements in the <see cref="TrackCollection"/> are unique.
		/// </para><para>
		/// <b>Unique</b> raises an <see cref="ArgumentException"/> if the specified 
		/// <paramref name="collection"/> contains any duplicate elements. The returned
		/// wrapper raises a <see cref="NotSupportedException"/> whenever the user attempts 
		/// to add an element that is already contained in the <b>TrackCollection</b>.
		/// </para><para>
		/// <strong>Note:</strong> The <b>Unique</b> wrapper reflects any changes made
		/// to the underlying <paramref name="collection"/>, including the possible
		/// creation of duplicate elements. The uniqueness of all elements is therefore
		/// no longer assured if the underlying collection is manipulated directly.
		/// </para></remarks>

		public static TrackCollection Unique(TrackCollection collection)
		{
			if (collection == null)
				throw new ArgumentNullException("collection");

			for (int i = collection.Count - 1; i > 0; i--)
				if (collection.IndexOf(collection[i]) < i)
					throw new ArgumentException("collection",
						"Argument cannot contain duplicate elements.");

			return new UniqueList(collection);
		}
		/// <summary>
		/// Returns a synchronized (thread-safe) wrapper
		/// for the specified <see cref="TrackCollection"/>.
		/// </summary>
		/// <param name="collection">The <see cref="TrackCollection"/> to synchronize.</param>
		/// <returns>
		/// A synchronized (thread-safe) wrapper around <paramref name="collection"/>.
		/// </returns>
		/// <exception cref="ArgumentNullException">
		/// <paramref name="collection"/> is a null reference.</exception>
		/// <remarks>Please refer to <see cref="ArrayList.Synchronized"/> for details.</remarks>

		public static TrackCollection Synchronized(TrackCollection collection)
		{
			if (collection == null)
				throw new ArgumentNullException("collection");

			return new SyncList(collection);
		}
		/// <summary>
		/// Returns a read-only wrapper for the specified <see cref="TrackCollection"/>.
		/// </summary>
		/// <param name="collection">The <see cref="TrackCollection"/> to wrap.</param>
		/// <returns>A read-only wrapper around <paramref name="collection"/>.</returns>
		/// <exception cref="ArgumentNullException">
		/// <paramref name="collection"/> is a null reference.</exception>
		/// <remarks>Please refer to <see cref="ArrayList.ReadOnly"/> for details.</remarks>

		public static TrackCollection ReadOnly(TrackCollection collection)
		{
			if (collection == null)
				throw new ArgumentNullException("collection");

			return new ReadOnlyList(collection);
		}