Catel - Part 4 of n: Unit testing with Catel

// --------------------------------------------------------------------------------------------------------------------
// <copyright file="ObservableCollectionExtensions.cs" company="Catel development team">
//   Copyright (c) 2008 - 2011 Catel development team. All rights reserved.
// </copyright>
// <summary>
//   Extension methods for <see cref="System.Collections.ObjectModel.ObservableCollection{T}" />.
// </summary>
// --------------------------------------------------------------------------------------------------------------------

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;

namespace Catel.Collections.ObjectModel
{
    /// <summary>
    /// Extension methods for <see cref="System.Collections.ObjectModel.ObservableCollection{T}"/>.
    /// </summary>
    public static class ObservableCollectionExtensions
    {
        #region Methods
        /// <summary>
        /// Add an range of items to the specified <see cref="System.Collections.ObjectModel.ObservableCollection{T}"/>.
        /// </summary>
        /// <typeparam name="T">Type of items within the observable collection.</typeparam>
        /// <param name="collection">The <see cref="System.Collections.ObjectModel.ObservableCollection{T}"/>.</param>
        /// <param name="range">An range of items.</param>
        /// <exception cref="ArgumentNullException">when <paramref name="collection"/> is <c>null</c>.</exception>
        /// <exception cref="ArgumentNullException">when <paramref name="range"/> is <c>null</c>.</exception>
        public static void AddRange<T>(this ObservableCollection<T> collection, IEnumerable<T> range)
        {
            if (collection == null)
            {
                throw new ArgumentNullException("collection");
            }

            if (range == null)
            {
                throw new ArgumentNullException("range");
            }

            foreach (T curItem in range)
            {
                collection.Add(curItem);
            }
        }
        #endregion
    }
}