form authentication case

<authentication mode="Forms">
            <forms protection="All" loginUrl="Login.aspx">
                <credentials passwordFormat="MD5">
                    <user name="sw" password="202CB962AC59075B964B07152D234B70"/>
                </credentials>
            </forms>
        </authentication>
        <authorization>
            <deny users="?"/>
        </authorization>

 

 

protected void btnLogin_Click(object sender, EventArgs e)
    {
        if (FormsAuthentication.Authenticate(tbUserName.Text, tbPassWord.Text))
        { FormsAuthentication.RedirectFromLoginPage(tbUserName.Text, CheckBoxIsPerminate.Checked); }
    }