C# .net中的GET和POST方法

public static string Post(string url, string postData)
{
byte[] byteArray = Encoding.UTF8.GetBytes(postData);
try
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.ContentType = "application/x-www-form-urlencoded";
request.Timeout = 30000;
request.Method = "POST";
request.ContentLength = byteArray.Length;

Stream requestStream = request.GetRequestStream();
requestStream.Write(byteArray, 0, byteArray.Length);
requestStream.Close();

HttpWebResponse webResponse = (HttpWebResponse)request.GetResponse();
StreamReader reader = new StreamReader(webResponse.GetResponseStream(), Encoding.UTF8);
String sResult = reader.ReadToEnd();
reader.Close();
return sResult;
}
catch (Exception ex)
{
return "<error>" + ex.Message + "</error>";
}

}

public static string Get(string url)
{
Uri ourUri = new Uri(url);
//WebProxy proxy = new WebProxy("172.16.200.200:8000", true);
//myWebRequest.Proxy = proxy;
WebRequest myWebRequest = WebRequest.Create(ourUri);
WebResponse myWebResponse = (HttpWebResponse)myWebRequest.GetResponse();
StreamReader stream = new StreamReader(myWebResponse.GetResponseStream(), Encoding.UTF8);
string resultStr = stream.ReadToEnd();
return resultStr;
}