C#プログラムからPOSTまたはPUTしてみる

C#のプログラムからデータをPOSTなりPUTしたいときのコードスニペット。

var request = (HttpWebRequest)WebRequest.Create("http://somewhere");
var buffer = Encoding.UTF8.GetBytes("data1=hello&data2=hi&data3=234");
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = buffer.Length;
request.CookieContainer = new CookieContainer();

var requestStream = request.GetRequestStream();
requestStream.Write(buffer, 0, buffer.Length);
requestStream.Flush();
requestStream.Close();

WebResponse response = null;
try
{
    response = request.GetResponse();
    var stream2 = response.GetResponseStream();
    var reader2 = new StreamReader(stream2);
    var resultText = reader2.ReadToEnd();
}
catch (Exception ex)
{
    if (response != null)
    {
        response.Close();
        response = null;
    }
}
finally
{
    request = null;
}