public void AddEdgeFirst(IEdge e)
{
if (!e.IsEdgeOf(Start))
{
throw new ArgumentException("Wrong edge");
}
_edges.Insert(0, e);
Start = e.GetOppositeOf(Start);
}
public void AddEdgeLast(IEdge e)
{
if (!e.IsEdgeOf(End))
{
throw new ArgumentException("Wrong edge");
}
_edges.Add(e);
End = e.GetOppositeOf(End);
}