Creating simple login page using dynamic controls

First In aspx page add panel control

<asp:Panel ID="Panel1" runat="server"></asp:Panel>

In Code Behind:

Label lbl = new Label();
        lbl.Text = "LoginForm";
        Panel1.Controls.Add(lbl);
        Panel1.Controls.Add(new LiteralControl("<br />"));
        Panel1.Controls.Add(new LiteralControl("<br />"));
        Label lblFirstName = new Label();
        lblFirstName.Text = "First Name: ";
        lblFirstName.ID = "lblFirstName";
        Panel1.Controls.Add(lblFirstName);
        TextBox txtFirstName = new TextBox();
        txtFirstName.ID = "txtFirstName";
        Panel1.Controls.Add(txtFirstName);
        Panel1.Controls.Add(new LiteralControl("<br />"));
        Panel1.Controls.Add(new LiteralControl("<br />"));
        Label lblLastName = new Label();
        lblLastName.Text = "Last Name: ";
        lblLastName.ID = "lblLastName";
        Panel1.Controls.Add(lblLastName);
        TextBox txtLastName = new TextBox();
        txtLastName.ID = "txtLastName";
        Panel1.Controls.Add(txtLastName);
        Panel1.Controls.Add(new LiteralControl("<br />"));
        Panel1.Controls.Add(new LiteralControl("<br />"));
        Label lblPassword = new Label();
        lblPassword.Text = "Password: ";
        lblPassword.ID = "lblPassword";
        Panel1.Controls.Add(lblPassword);
        TextBox txtPassword = new TextBox();
        txtPassword.ID = "txtPassword";
        Panel1.Controls.Add(txtPassword);
        Panel1.Controls.Add(new LiteralControl("<br />"));
        Panel1.Controls.Add(new LiteralControl("<br />"));
        Button btnSave = new Button();
        btnSave.ID = "Login";
        btnSave.Text = "Login";
        Panel1.Controls.Add(btnSave);
        lbl.Attributes.Add("onClick", "Login();");

Thanks & Regards