protected void btnSubmit_Click(object sender, EventArgs e)
        {
            var vGetUsers = BooksDC.GB_Users.Select(x => x.Username).ToList();
            var vGetPassForUser = BooksDC.GB_Users.Where(x => x.Username.Equals(txtbUser.Text)).Select(x => x.Password).FirstOrDefault();

            if (vGetUsers.Contains(txtbUser.Text) && vGetPassForUser.Equals(txtbPass.Text))
            {
                var vGetUserStatus = BooksDC.GB_Users.Where(x => x.Username.Equals(txtbUser.Text)).Select(x => x.Type).FirstOrDefault();
                if (vGetUserStatus == "Admin")
                {
                    userLoggedIn = true;
                    Response.Redirect(@"Adminpanel.aspx");

                }
                else
                {
                    Response.Redirect(@"Default.aspx");
                }

            }
            else
            {
                Response.Write("<script>alert('Wrong username or Password!')</script>");
            }
        }