how to send data post Request in asp.net my code here:

public void post(string a, string b, string c, string d)

{

ASCIIEncoding encoding = new ASCIIEncoding();

string postData = "code=" + a;

postData += ("&a=" + b);

postData += ("&b=" + c);

postData += ("&c=" + d);

byte[] data = encoding.GetBytes(postData);

HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create("https://codbazar.com/POPAuthenticate");

myRequest.Method = "POST";

myRequest.ContentType = "application/x-www-form-urlencoded";

myRequest.ContentLength = data.Length;

Stream newStream = myRequest.GetRequestStream();

newStream.Write(data, 0, data.Length);

newStream.Close();

Response.Redirect("https://codebazar.com/POPAuthenticate?" + postData);

// HttpHelper.RedirectAndPOST(this.Page, "https://codebazar.com/POPAuthenticate", postData);

}