private void Form1_Load(object sender, EventArgs e)
{
TextBox textBox1 = new TextBox();
textBox1.Location = new System.Drawing.Point(100, 200);
textBox1.Name = "textBox1";
textBox1.Size = new System.Drawing.Size(100, 20);
textBox1.Text = "helloo";
this.Controls.Add(textBox1);
}