GET & POST requests' functions in C#

get-post-functions.cs

private static string POST(string Url, string Data) {
    System.Net.WebRequest req = System.Net.WebRequest.Create(Url);
    req.Method = "POST";
    req.Timeout = 100000;
    req.ContentType = "application/x-www-form-urlencoded";
    // Кодировка указывается в зависимости от кодировки клиента
    byte[] sentData = Encoding.GetEncoding(1251).GetBytes(Data);
    req.ContentLength = sentData.Length;
    System.IO.Stream sendStream = req.GetRequestStream();
    sendStream.Write(sentData, 0, sentData.Length);
    sendStream.Close();
    System.Net.WebResponse res = req.GetResponse();
    System.IO.Stream ReceiveStream = res.GetResponseStream();
    System.IO.StreamReader sr = new System.IO.StreamReader(ReceiveStream, Encoding.UTF8);
    // Кодировка указывается в зависимости от кодировки ответа сервера
    Char[] read = new Char[256];
    int count = sr.Read(read, 0, 256);
    string Out = String.Empty;
    while (count > 0) {
        String str = new String(read, 0, count);
        Out += str;
        count = sr.Read(read, 0, 256);
    }
    return Out;
}
private static string GET(string Url, string Data) {
    System.Net.WebRequest req = System.Net.WebRequest.Create(Url + "?" + Data);
    System.Net.WebResponse resp = req.GetResponse();
    System.IO.Stream stream = resp.GetResponseStream();
    System.IO.StreamReader sr = new System.IO.StreamReader(stream);
    string Out = sr.ReadToEnd();
    sr.Close();
    return Out;
}