int IBidirectionalIncidenceGraph <TVertex, TEdge> .Degree(TVertex v)
{
IBidirectionalIncidenceGraph <TVertex, TEdge> ithis = this;
Contract.Requires(v != null);
Contract.Requires(ithis.ContainsVertex(v));
Contract.Ensures(Contract.Result <int>() == ithis.InDegree(v) + ithis.OutDegree(v));
return(default(int));
}