public bool Connected(N i, N j)
{
if (i == null || j == null)
{
throw new ArgumentNullException();
}
if (!id.Contains(i) || !id.Contains(j))
{
throw new ArgumentException();
}
return(Root(i).Equals(Root(j)));
}
/// <summary> /// Returns true if there is a path from the source vertex to <code>v</code>, false otherwise. /// </summary> public bool Contains(Vertex vertex) => vertex.Equals(Source) || edgeTo.Contains(vertex);