public Form1()
        {

            InitializeComponent();
            g = panel1.CreateGraphics();
        }
        public enum FigType
        {
            circle, rect, triangle  //nbg lfyysq[
        }

        FigType typeF; // == circle
        Graphics g;
        int xOLD; int yOLD;

        private void panel1_MouseDown(object sender, MouseEventArgs e)
        {
            xOLD = e.X;
            yOLD = e.Y;
        }

        private void rect_Click(object sender, EventArgs e)
        {
            typeF = FigType.rect;
        }

        private void circle_Click(object sender, EventArgs e)
        {
            typeF = FigType.circle;
        }

        private void traingle_Click(object sender, EventArgs e)
        {
            typeF = FigType.triangle;
        }

        private void panel1_MouseUp(object sender, MouseEventArgs e)
        {
            int width; int height;
            if (xOLD > e.X && yOLD > e.Y)
            {

                width = xOLD - e.X;
                height = yOLD - e.Y;
            }
            else
            {
                width = e.X - xOLD;
                height = e.Y - yOLD;
            }

            if (typeF == FigType.rect)
            {
                Rectangle rect = new Rectangle(xOLD, yOLD, width, height, colorDialog1.Color, colorDialog2.Color);
                rect.Draw(g);
            }

            if (typeF == FigType.circle)
            {
                Cirkle cirk = new Cirkle(xOLD, yOLD, width, height, colorDialog1.Color, colorDialog2.Color);
                cirk.Draw(g);
            }

            if (typeF == FigType.triangle)
            {
                Traingle cirk = new Traingle(xOLD, yOLD, width, height, colorDialog1.Color, colorDialog2.Color);
                cirk.Draw(g);
            }


        }

        private void button3_Click(object sender, EventArgs e)
        {
            if (colorDialog1.ShowDialog() == DialogResult.OK)
                Color.BackColor = colorDialog1.Color;
        }

        private void zalivka_Click(object sender, EventArgs e) // не так фурычит
        {
            if (colorDialog2.ShowDialog() == DialogResult.OK)
                Color.BackColor = colorDialog2.Color;
        }