/// <summary>
/// Checks whether or not this <see cref="GraphArc"/> and another
/// instance of <see cref="GraphArc"/> connect the same two instances of <see cref="GraphNode"/>.
/// </summary>
/// <param name="arc2">The second instance of <see cref="GraphArc"/> to test.</param>
/// <returns>
/// <c>true</c> if both instances connect the same cells; otherwise, <c>false</c>
/// </returns>
public bool IsDuplicata(GraphArc arc2)
{
return(IsCellIn(arc2.node1.Cell) && IsCellIn(arc2.node2.Cell));
}
/// <summary>
/// Tests the equality between the fields of two <see cref="GraphArc"/> instances.
/// </summary>
/// <param name="arc2">The <see cref="GraphArc"/> on which the test is realized.</param>
/// <returns>
/// <c>true</c> if the specified <see cref="GraphArc"/>'s fields are equal to this instance; otherwise, <c>false</c>
/// </returns>
protected bool Equals(GraphArc arc2)
{
return(node1.Cell.Equals(arc2.node1.Cell) &&
node2.Cell.Equals(arc2.node2.Cell));
}