Ошибка с типами данных

   private void button3_Click(object sender,EventArgs e, PaintEventArgs x)
        {
            textBox2.Text = cez(textBox2.Text);
            pictureBox1.Image = picture(pictureBox1.Image, x); //здесь ошибка
        }       

     public string picture(object sender, PaintEventArgs e)
        {
            string str = textBox2.Text; 
            foreach (char c in str.ToCharArray())
            {
                switch (c)
                {
                    case '1':
                        white(sender,e);
                        break;
                    case '0':
                        black(sender,e);
                        break;
                }
            }
            return str;
        }
     public void white(object sender, PaintEventArgs e)
        {
            Random random = new Random();
            int x = random.Next(0, 100); 
            int y = random.Next(0, 100);
            e.Graphics.FillRectangle(Brushes.White, x, y, 1, 1);
        }

        public void black(object sender, PaintEventArgs e)
        {
            Random random = new Random();
            int x = random.Next(0, 100);
            int y = random.Next(0, 100);
            e.Graphics.FillRectangle(Brushes.Black, x, y, 1, 1);
        }