使用HttpWebRequest发送XML结构化数据，并反序列化返回XML

一般来说，发送大型数据到Web服务端，基本使用post方法，这是使用HttpWebRequest发送XML结构化数据的一种非常基本的方法。

示例代码如下：

//外部参数
XElement pRequestXML;
//
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(new Uri(myUrl));
request.Method = "POST";
request.ContentType = "application/xml";
request.Accept = "application/xml";

byte[] pBytes = Encoding.UTF8.GetBytes(pRequestXML.ToString());

request.ContentLength = pBytes.Length;

using (Stream pStream = request.GetRequestStream())
{
    pStream.Write(pBytes, 0, pBytes.Length);
}

// Log the response from Redmine RESTful service
using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
using (StreamReader reader = new StreamReader(response.GetResponseStream()))
{
    var pStr = reader.ReadToEnd();
    Logger.Info("Response from web server: " + pStr);
    using (StringReader sr = new StringReader(pStr))
	{
    	XmlSerializer xz = new XmlSerializer(typeof(Product));
    	product = xz.Deserialize(sr) as Product;
        return product;
	}
}

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