public void AddPredecessor(TVertex vertex, TEdge edge)
{
if (vertex == null)
{
throw new ArgumentNullException(nameof(vertex));
}
if (edge == null)
{
throw new ArgumentNullException(nameof(edge));
}
if (!InedgeCollections.ContainsKey(vertex))
{
InedgeCollections[vertex] = new List <TEdge>();
}
InedgeCollections[vertex].Add(edge);
}
public IEnumerable <TEdge> IncidentEdgesConnecting(TVertex vertex)
{
if (vertex == null)
{
throw new ArgumentNullException(nameof(vertex));
}
var incidentEdges = new List <TEdge>();
if (InedgeCollections.ContainsKey(vertex))
{
incidentEdges.AddRange(InedgeCollections[vertex]);
}
if (OutedgeCollections.ContainsKey(vertex))
{
incidentEdges.AddRange(OutedgeCollections[vertex]);
}
return(incidentEdges);
}