当页面被重新加载到asp.net时，Cookie不起作用

当我的登录按钮被点击时，它应该会创建这个cookie

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            HttpCookie testCookie =  new HttpCookie("UserInfo");
            testCookie.Expires = DateTime.Now.AddDays(1);
            Response.Cookies.Add(testCookie);
        }
    }
    protected void NavigationMenu_MenuItemClick(object sender, MenuEventArgs e)
    {
    }
    protected void Login1_Authenticate(object sender, AuthenticateEventArgs e)
    {
    }
    protected void LoginView1_ViewChanged(object sender, EventArgs e)
    {
    }

    protected void btnLogIn_Click(object sender, EventArgs e)
    {
        if (UserEmail.Text == "example@hotmail.com" && TextBox1.Text == "qwerty1")
        {
            HttpCookie cookie = Request.Cookies["UserInfo"];
            cookie["userName"] = UserEmail.Text;
            cookie["booleanCheck"] = "true";
            Response.Cookies.Add(cookie);
            Response.Redirect(Request.RawUrl);
        }
        else
        {
            ErrorMessage.Visible = true;
            ErrorEmail.Visible = true;
            ErrorPassword.Visible = true;
        }
    }
}

}

然后，上面保存的cookie应该用于设置网站的主页面。

public partial class _Default : System.Web.UI.Page
    {
    Boolean found = false;
    protected void Page_Load(object sender, EventArgs e)
    {
    }

    protected void Page_PreInit(object sender, EventArgs e)
    {
        String signedInCheck = "false";
        HttpCookie cookie = Request.Cookies["userInfo"];
        if (cookie != null)
        {
            signedInCheck = cookie["booleanCheck"];
        }
        try
        {
            if (signedInCheck != "true")
                this.Page.MasterPageFile = "~/Site.Master";
            else
                this.Page.MasterPageFile = "~/LoggedIn.Master";
        }
        catch (Exception ex)
        {
        }
    }
}
}

此代码用于切换到第二个母版页，但当页面被重新定向，甚至返回到其自身时，它会切换回第一个母版页面。如何更改此设置，以便在登录时始终显示第二个主页面。

HttpCookie myCookie = new HttpCookie("UserSettings");
myCookie["Font"] = "Arial";
myCookie["Color"] = "Blue";
myCookie.Expires = DateTime.Now.AddDays(1d);
Response.Cookies.Add(myCookie);