Code

SqlCommand cmd = new SqlCommand();
cmd.Connection = conn;
cmd.CommandType = CommandType.Text;
cmd.CommandText = "SELECT * FROM dbo.Nodes";
SqlDataReader reader = cmd.ExecuteReader();
while (reader.Read())
{
	Box node = fc.CreateBox(0, 0, 40, 30);
	node.Tag = reader.GetInt32(0);
	node.Text = reader.GetString(1);
}
reader.Close();

cmd = new SqlCommand();
cmd.Connection = conn;
cmd.CommandType = CommandType.Text;
cmd.CommandText = "SELECT * FROM dbo.Links";
reader = cmd.ExecuteReader();
while (reader.Read())
{
	fc.CreateArrow(
		fc.FindBox(reader.GetInt32(1)),
		fc.FindBox(reader.GetInt32(2)));
}

AnnealLayout al = new AnnealLayout();
al.Arrange(fc);