/// <summary>
/// Sort the collection.
/// </summary>
/// <typeparam name="T">The type of each element.</typeparam>
/// <param name="this">(<see langword="this"/> parameter) The collection.</param>
public static void Sort <T>(this IBag <T> @this) where T : notnull
{
var list = @this.ToList();
list.Sort();
@this.Clear();
@this.AddRange(list);
}