C# 如何获取未知的属性列表

问：

当我发送请求时，我会得到这样的响应：

<?xml version="1.0" encoding="UTF-8"?>
<response result="0">
    <check result="0">
        <extras PRV_TXN_ID="538659" disp1="text1" disp2="text2" disp3="text3"/>
    </check>
</response>

我想在控制台中显示属性列表。属性数量未知，取决于请求。有时会有.在这个响应中，有 3 个属性，在得到响应之前，我不知道它们有多少。怎么做呢？dispdispdisp1.....disp8disp

这是我的解析：

public static XmlDocument postXMLData(string xml)
{
    var request = (HttpWebRequest)WebRequest.Create(Requests.url);
    byte[] bytes;
    bytes = System.Text.Encoding.ASCII.GetBytes(xml);
    request.ContentType = "text/xml; encoding='utf-8'";
    request.ContentLength = bytes.Length;
    request.Method = "POST";
    Stream requestStream = request.GetRequestStream();
    requestStream.Write(bytes, 0, bytes.Length);
    requestStream.Close();
    HttpWebResponse response;
    response = (HttpWebResponse)request.GetResponse();

    if (response.StatusCode == HttpStatusCode.OK)
    {
        using (var streamReader = new StreamReader(response.GetResponseStream()))
        {
            var responseText = streamReader.ReadToEnd();
            var result = new XmlDocument();
            result.LoadXml(responseText);
            return result;
        }
    }

    throw new Exception("что то не так");
}