ストップウォッチ - peace098beat/windows_applicaciton GitHub Wiki

Graphics g = pictureBox2.CreateGraphics();

//ストップウォッチを開始
sw.Reset();
sw.Start();

p = Pens.Red;
int X = 0; X < pictureBox2.Width; X += 1)
{
  DrawLine(p, X, 0, X, pictureBox1.Height);
}

//ストップウォッチを終了する
sw.Stop();
double time = sw.ElapsedTicks / (double)System.Diagnostics.Stopwatch.Frequency * 1000.0;
MessageBox.Show("DrawTime = " + time.ToString() + "msec");
sw.Reset();