ASPx set Cookie Domain

I have a code as follows开发者_运维问答:

 this.Response.Cookies.Add(new HttpCookie("COOKIENAME",'test'));

I want to add the domain ".test.com" for this cookie. How do I do so? I tried the standard:

    this.Response.Cookies["COOKIENAME"].Domain = ".test.co.uk";

But the cookie is not being set for the whole domain. Any suggestions?

The following is not working either:

HttpCookie MyCookie = new HttpCookie("COOKIENAME");
        MyCookie.Value = 'test';
        MyCookie.Domain = ".test.co.uk";

        this.Response.Cookies.Add(MyCookie);

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I don't think you need the ".", so just MyCookie.Domain = "test.co.uk";.

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I think you should use the Cookie Path property to define the domain of the cookie