private void FindANodeBtn_Click(object sender, EventArgs e)//результирующая кнопка
{
Graphics gr = CreateGraphics();
graph.ClearVisit();
int n1 = -1, n2 = -1;
da.GetNode(graph.nodes, ref n1, ref n2);
graph.FindNodeNew(n1, n2);
da.ShowGraph(gr, DefaultBackColor);
GetN1TB.Text = n1.ToString();
GetN2TB.Text = n2.ToString();
}
