/// <summary>
/// Moves a waggon at the specified index one step up.
/// </summary>
/// <param name="index">The index of the waggon.</param>
public virtual void MoveWaggonUpAt(int index)
{
Contract.Requires <ArgumentOutOfRangeException>(index >= 0 && index < Waggons.Count());
Contract.Assume(index < this._waggons.Count);
Waggon waggon = this._waggons[index];
this._waggons.RemoveAt(index);
this._waggons.Insert(index - 1, waggon);
}
/// <summary>
/// Adds a <see cref="Waggon" /> to the end of the list of waggons.
/// </summary>
/// <param name="waggon">The <see cref="Waggon" /> to add.</param>
/// <exception cref="ArgumentNullException">When <paramref name="waggon" /> is null.</exception>
public virtual void AddNewWaggon(Waggon waggon)
{
Contract.Requires<ArgumentNullException>(waggon != null);
this._waggons.Add(waggon);
}
/// <summary>
/// Adds a <see cref="Waggon" /> to the end of the list of waggons.
/// </summary>
/// <param name="waggon">The <see cref="Waggon" /> to add.</param>
/// <exception cref="ArgumentNullException">When <paramref name="waggon" /> is null.</exception>
public virtual void AddNewWaggon(Waggon waggon)
{
Contract.Requires <ArgumentNullException>(waggon != null);
this._waggons.Add(waggon);
}