Matrix m1 = Matrix.Identity, m2 = Matrix.Identity, m3 = Matrix.Identity;
            System.Diagnostics.Stopwatch s = new System.Diagnostics.Stopwatch();
            s.Start();
            for (int i = 0; i < 10000000; i++)
                Matrix.Multiply(ref m2, ref m3, out m1);
            s.Stop();
            string time1 = s.ElapsedMilliseconds.ToString();
            s.Reset();
            s.Start();
            for (int i = 0; i < 10000000; i++)
                m1 = m2*m3;

            s.Stop();
            string time2 = s.ElapsedMilliseconds.ToString();
            System.Windows.Forms.MessageBox.Show(time1 + ", " + time2);