c# - Resharper:可能对标有 notnull 属性的实体进行空分配

Question

我在 response.GetResponseStream() 上收到此警告我该如何处理？

// Get response  
using (var response = request.GetResponse() as HttpWebResponse)
{
    // Get the response stream  
    if (response != null)
    {
        var reader = new StreamReader(response.GetResponseStream());
        var responseString = reader.ReadToEnd();
        return responseString;
    }
}

为了清晰起见，基于一些答案的误解:

此行不出现警告的地方:

using (var response = request.GetResponse() as HttpWebResponse)

此行是出现警告的地方:

var reader = new StreamReader(response.GetResponseStream());

Answer 1

var reader = new StreamReader(response.GetResponseStream());

我怀疑 StreamReader 构造函数的参数有一个 notnull 属性。尝试以下操作:

var stream = response.GetResponseStream();
if (stream == null)
  // throw an exception
var reader = new StreamReader(stream);