private void Form1_Load(object sender, EventArgs e)
        {
            for (int i = 0; i < 50; i++)
            {
                TextBox txtBox = new TextBox();
                txtBox.Name = "TextBox" + i.ToString();
                txtBox.Width = 50;
                txtBox.Location = new Point(100+(i%5)*50,100+(i/5)*30);
                this.Controls.Add(txtBox);
            }
        }