c# iki ayrı random komutu aynı random

private **** button1_Click(object sender, EventArgs e)
        {

            
            int a = r.Next(1, 7);
            int b = r.Next(1, 7);
            topb = a + b;
            topb2 = topb2+topb ;
            label2.Text = a.ToString();
            label4.Text = b.ToString();
            label6.Text = topb.ToString();
            label15.Text = topb2.ToString();

            if (a == 1)
            {
                pictureBox1.Image******** = "C:\\Users\\*\\Desktop\\1.jpg";
            }
            if (a == 2)
            {
                pictureBox1.Image******** = "C:\\Users\\*\\Desktop\\2.jpg";
            }
            if (a == 3)
            {
                pictureBox1.Image******** = "C:\\Users\\*\\Desktop\\3.jpg";
            }
            if (a == 4)
            {
                pictureBox1.Image******** = "C:\\Users\\*\\Desktop\\4.jpg";
            }
            if (a == 5)
            {
                pictureBox1.Image******** = "C:\\Users\\*\\Desktop\\5.jpg";
            }
            if (a == 6)
            {
                pictureBox1.Image******** = "C:\\Users\\*\\Desktop\\6.jpg";
            }
            //------------------------------------------------------------------------------------
            if (b == 1)
            {
                pictureBox2.Image******** = "C:\\Users\\*\\Desktop\\1.jpg";
            }
            if (b == 2)
            {
                pictureBox2.Image******** = "C:\\Users\\*\\Desktop\\2.jpg";
            }
            if (b == 3)
            {
                pictureBox2.Image******** = "C:\\Users\\*\\Desktop\\3.jpg";
            }
            if (b == 4)
            {
               pictureBox2.Image******** = "C:\\Users\\*\\Desktop\\4.jpg";
            }
            if (b == 5)
            {
                pictureBox2.Image******** = "C:\\Users\\*\\Desktop\\5.jpg";
            }
            if (b == 6)
            {
                pictureBox2.Image******** = "C:\\Users\\*\\Desktop\\6.jpg";
            }

            
            

        }

        private **** Form1_Load(object sender, EventArgs e)
        {
            
        }

        private **** button2_Click(object sender, EventArgs e)
        {
            
            int c = x.Next(1,7);
            int d = x.Next(1,7);
            top =c + d;
            label8.Text = c.ToString();
            label10.Text = d.ToString();
            topp = topp+ top;
            label12.Text = top.ToString();
            label17.Text = topp.ToString();

            if (c == 1)
            {
                pictureBox1.Image******** = "C:\\Users\\*\Desktop\\1.jpg";
            }
            if (c == 2)
            {
                pictureBox1.Image******** = "C:\\Users\\*\\Desktop\\2.jpg";
            }
            if (c == 3)
            {
                pictureBox1.Image******** = "C:\\Users\\*\\Desktop\\3.jpg";
            }
            if (c == 4)
            {
                pictureBox1.Image******** = "C:\\Users\\*\\Desktop\\4.jpg";
            }
            if (c == 5)
            {
                pictureBox1.Image******** = "C:\\Users\\*\\Desktop\\5.jpg";
            }
            if (c == 6)
            {
                pictureBox1.Image******** = "C:\\Users\\*\\Desktop\\6.jpg";
            }
            //------------------------------------------------------------------------------------
            if (d == 1)
            {
                pictureBox2.Image******** = "C:\\Users\\*\\Desktop\\1.jpg";
            }
            if (d == 2)
            {
                pictureBox2.Image******** = "C:\\Users\\*\\Desktop\\2.jpg";
            }
            if (d == 3)
            {
                pictureBox2.Image******** = "C:\\Users\\*\\Desktop\\3.jpg";
            }
            if (d == 4)
            {
                pictureBox2.Image******** = "C:\\Users\\*\\Desktop\\4.jpg";
            }
            if (d == 5)
            {
                pictureBox2.Image******** = "C:\\Users\\*\\Desktop\\5.jpg";
            }
            if (d == 6)
            {
                pictureBox2.Image******** = "C:\\Users\\*\\Desktop\\6.jpg";
            }

            
        }