public bool IsConnected(T a, T b)
{
ResetMarked();
var s = new ConnectedVertices <T>(this, a);
return(IsMarked(b));
}
public void RemoveConnected(Vertex v) => ConnectedVertices.Remove(v);
public void AddConnected(Vertex v) => ConnectedVertices.Add(v);
public bool HasEdge(Vertex v) => ConnectedVertices.Exists(vertex => vertex.Id == v.Id);
public bool HasEdge(Vertex v) => ConnectedVertices.ContainsKey(v.Id);
//public DirectedEdge Connect(DirectedVertex head)
//{
// var _e = new DirectedEdge(this, head);
// //ConnectedEdges.Add(_e);
// return _e;
//}
public void Connect(DirectedVertex head)
{
ConnectedVertices.Add(head);
}