how to create simple login page in asp.net?with out using login controls

SqlConnection cn = new SqlConnection();
cn.ConnectionString=System.Web.Configuration.WebConfigurationManager.ConnectionStrings["cnn"].ToString();
cn.Open();

        string cmd = "select id,Password from LogIn where id=@LoginID and Password=@Password";
SqlCommand cmd = new SqlCommand(cmd,cn);
        cmd.Parameters.AddWithValue("@LoginID", TextBox1.Text);
        cmd.Parameters.AddWithValue("@Password", TextBox2.Text);
       SqlDataReader dr = cmd.ExecuteReader();
        if (dr.Read())
        {
     Response.Redirect("groupdeatils.aspx");
            
         }
else
{
    Response.Write("Invalid attempt to login");
}