ASP.net Return html response

You could consider the "WebRequest" class, which full fill your entire requirements. I will provide the sample snippet below:

            WebRequest request = WebRequest.Create("YourURLHere");
            // Set the Method property of the request to POST.
            request.Method = "POST";
            // Create POST data and convert it to a byte array.
            string postData = "YourArgumentsToBePost";
            byte[] byteArray = Encoding.UTF8.GetBytes(postData);
            // Set the ContentType property of the WebRequest.
            request.ContentType = "application/x-www-form-urlencoded";
            // Set the ContentLength property of the WebRequest.
            request.ContentLength = byteArray.Length;
            // Get the request stream.
            Stream dataStream = request.GetRequestStream();
            // Write the data to the request stream.
            dataStream.Write(byteArray, 0, byteArray.Length);
            // Close the Stream object.
            dataStream.Close();
            // Get the response.
            WebResponse response = request.GetResponse();
            // Display the status.

            dataStream = response.GetResponseStream();

            // Open the stream using a StreamReader for easy access.
            StreamReader readerst = new StreamReader(dataStream);

            // Read the content.
            string responseFromServer = readerst.ReadToEnd();

            readerst.Close();
            // reader.Close();
            dataStream.Close();
            response.Close();