当网页大量使用状态码而不是所有的都是错误的时候，这会很烦人。这会让处理正文变得很痛苦。我个人使用这种扩展方法来获得响应。

public static class HttpWebResponseExt
{
    public static HttpWebResponse GetResponseNoException(this HttpWebRequest req)
    {
        try
        {
            return (HttpWebResponse)req.GetResponse();
        }
        catch (WebException we)
        {
            var resp = we.Response as HttpWebResponse;
            if (resp == null)
                throw;
            return resp;
        }
    }
}

为什么不呢？它们都是有效的设计选项，而HttpWebRequest就是设计成这样工作的。

就像@Will一样，我编写了类似的扩展方法来从WebException中获取字符串形式的响应内容。

/// <summary>
        /// Reads Response content in string from WebException
        /// </summary>
        /// <param name="webException"></param>
        /// <returns></returns>
        public static (HttpStatusCode statusCode, string? responseString) GetResponseStringNoException(this WebException webException)
        {
            if (webException.Response is HttpWebResponse response)
            {
                Stream responseStream = response.GetResponseStream();

                StreamReader streamReader = new(responseStream, Encoding.Default);

                string responseContent = streamReader.ReadToEnd();
                HttpStatusCode statusCode = response.StatusCode;

                streamReader.Close();
                responseStream.Close();
                response.Close();

                return (statusCode, responseContent);
            }
            else
            {
                return (HttpStatusCode.InternalServerError, null);
            }
        }

以上代码是未优化的解决方案。