Asp.Net WebAPI 中Cookie 获取操作方式

/// <summary>
///获取上下文中的cookie
/// </summary>
/// <returns></returns>
[HttpGet]
[HttpPost]
public stringGetOne()
{
    //1.在WebApi中这种方式获取cookie 可以成功
    //2.在WebApi 中这种凡是获取Form,QueryString 中的参数是有效的
    HttpCookieCollection collection=HttpContext.Current.Request.Cookies;
    //1.获取传统context,再获取cookie 可以成功
    HttpContextBase baseContext = (HttpContextBase)Request.Properties["MS_HttpContext"];
    HttpCookieCollection cookie2 =baseContext.Request.Cookies;
    //2.api中推荐的获取操作cooki 方式
    Collection<CookieHeaderValue> cookieValues=Request.Headers.GetCookies();
    return CookieHelper.GetString("username");
}