Analyzer.SubgraphCalculator.AddOuterEdgesToSubgraph C# (CSharp) Method

        AddOuterEdgesToSubgraph
        (
            Int32 iOuterLevel,
            Dictionary<IVertex, Int32> oSubgraphVertices,
            HashSet<IEdge> oSubgraphEdges
        )
        {
            Debug.Assert(iOuterLevel > 0);
            Debug.Assert(oSubgraphVertices != null);
            Debug.Assert(oSubgraphEdges != null);

            // Loop through the subgraph's vertices.

            foreach (KeyValuePair<IVertex, Int32> oKeyValuePair in
                oSubgraphVertices)
            {
                if (oKeyValuePair.Value != iOuterLevel)
                {
                    continue;
                }

                IVertex oVertex = oKeyValuePair.Key;

                // This is an outermost vertex.  Loop through its incident edges.

                foreach (IEdge oIncidentEdge in oVertex.IncidentEdges)
                {
                    IVertex oAdjacentVertex =
                        oIncidentEdge.GetAdjacentVertex(oVertex);

                    Int32 iAdjacentVertexLevel;

                    // If the incident edge connects the outermost vertex to
                    // another outermost vertex in the subgraph, add the edge.

                    if (
                        oSubgraphVertices.TryGetValue(
                            oAdjacentVertex, out iAdjacentVertexLevel)
                        &&
                        iAdjacentVertexLevel == iOuterLevel
                        )
                    {
                        oSubgraphEdges.Add(oIncidentEdge);
                    }
                }
            }
        }
    }