SetUp()
{
m_oGraph = new Graph();
Debug.Assert(m_oGraph.Edges is EdgeCollection);
IEdgeCollection oEdgeCollection = m_oGraph.Edges;
Debug.Assert(oEdgeCollection.GetEnumerator() is
EdgeCollection.Enumerator);
m_oEnumerator =
(EdgeCollection.Enumerator)oEdgeCollection.GetEnumerator();
Debug.Assert(m_oGraph.Vertices is VertexCollection);
m_oVertexCollection = m_oGraph.Vertices;
}