private void BuildGraph()
{
GraphNode nodeR = new GraphNode('r');
GraphNode nodeS = new GraphNode('s');
GraphNode nodeT = new GraphNode('t');
GraphNode nodeU = new GraphNode('u');
GraphNode nodeV = new GraphNode('v');
GraphNode nodeW = new GraphNode('w');
GraphNode nodeX = new GraphNode('x');
GraphNode nodeY = new GraphNode('y');
nodeR.AddAdj(nodeS);
nodeR.AddAdj(nodeV);
nodeS.AddAdj(nodeR);
nodeS.AddAdj(nodeW);
nodeT.AddAdj(nodeW);
nodeT.AddAdj(nodeX);
nodeT.AddAdj(nodeU);
nodeU.AddAdj(nodeT);
nodeU.AddAdj(nodeX);
nodeU.AddAdj(nodeY);
nodeV.AddAdj(nodeR);
nodeW.AddAdj(nodeS);
nodeW.AddAdj(nodeT);
nodeW.AddAdj(nodeX);
nodeX.AddAdj(nodeW);
nodeX.AddAdj(nodeT);
nodeX.AddAdj(nodeU);
nodeX.AddAdj(nodeY);
nodeY.AddAdj(nodeX);
nodeY.AddAdj(nodeU);
GraphNodeList.Add(nodeR);
GraphNodeList.Add(nodeS);
GraphNodeList.Add(nodeT);
GraphNodeList.Add(nodeU);
GraphNodeList.Add(nodeV);
GraphNodeList.Add(nodeW);
GraphNodeList.Add(nodeX);
GraphNodeList.Add(nodeY);
DFS(GraphNodeList);
//PrintPath(GraphNodeList, nodeS, nodeY);
}