检查Null异常的正确方法是什么？

哪个代码最正确？

if (HttpContext.Current.Response.Cookies[authCookieName] != null) {
    HttpContext.Current.Response.Cookies[authCookieName].Value = "New Value";
}

要么

if (HttpContext.Current != null)
    if (HttpContext.Current.Response != null)
        if (HttpContext.Current.Response.Cookies != null)
            if (HttpContext.Current.Response.Cookies[authCookieName] != null)
                HttpContext.Current.Response.Cookies[authCookieName].Value = "New Value";

yfeldblum.. 19

如果HttpContext,HttpContext.Current,HttpContext.Current.Response或Http.Current.Response.Cookies中的任何一个为空,那么您已经遇到了麻烦.让异常发生并修复您的Web服务器.

如果HttpContext,HttpContext.Current,HttpContext.Current.Response或Http.Current.Response.Cookies中的任何一个为空,那么您已经遇到了麻烦.让异常发生并修复您的Web服务器.