Getting The Content From Textbox Using C#?

i have created two dynamic textboxes. like this...

protected void Button2_Click(object sender, EventArgs e)
{
TextBox1 = new TextBox();
TextBox1.ID = "TextBox1";
TextBox1.Style["Position"] = "Absolute";
TextBox1.Style["Top"] = "25px";
TextBox1.Style["Left"] = "100px";
Panel1.Controls.Add(TextBox1);
TextBox2 = new TextBox();
TextBox2.ID = "TextBox2";
TextBox2.Style["Position"] = "Absolute";
TextBox2.Style["Top"] = "60px";
TextBox2.Style["Left"] = "100px";
Panel1.Controls.Add(TextBox2);
//this.TextBox1.TextChanged += new System.EventHandler(this.TextBox_TextChanged);
//this.TextBox2.TextChanged += new System.EventHandler(this.TextBox_TextChanged);
}

now, i want to retrieve the content from the textboxes.