C # background POST request (WinForm)

Data: Parameter URL: path

public static string Postwebrequest (String Data, String URL)
{
Cookiecontainer cc = new Cookiecontainer ();
string postdata = Data;
byte[] ByteArray = Encoding.UTF8.GetBytes (postdata); Transformation
HttpWebRequest WebRequest2 = (HttpWebRequest) webrequest.create (new Uri (URL));
Webrequest2.cookiecontainer = CC;
Webrequest2.method = "POST";
Webrequest2.contenttype = "application/x-www-form-urlencoded";
Webrequest2.contentlength = Bytearray.length;
Stream newstream = Webrequest2.getrequeststream ();
Newstream.write (ByteArray, 0, bytearray.length); Write parameters
Newstream.close ();
HttpWebResponse Response2 = (HttpWebResponse) webrequest2.getresponse ();
StreamReader SR2 = new StreamReader (response2. GetResponseStream (), Encoding.UTF8);
String text2 = SR2. ReadToEnd ();
if (Text2! = null && text2. Length > 0)
{
return text2;
}
Return "";
}