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csharppublic string HttpPost(string strUrl, string strPostData){ string result=string.Empty; try { HttpWebRequest request=HttpWebRequest.Create(strUrl) as HttpWebRequest; // Additional code to handle the request and post data } catch (Exception ex) { result=ex.Message; } return result;}

using System.Net;
using System.Net.Cache;
using System.IO;

string HttpPost(string strUrl, string strPostData)
{
string result = string.Empty;
try
{
HttpWebRequest request = HttpWebRequest.Create(strUrl) as HttpWebRequest;
request.ContentType = "application/json";//or application/xml
request.Method = "POST";
request.Timeout = 5000;
request.Accept = "*/*";
request.KeepAlive = true;
request.CachePolicy = new HttpRequestCachePolicy(HttpRequestCacheLevel.NoCacheNoStore);

byte[] bytes = Encoding.UTF8.GetBytes(strPostData);
request.ContentLength = bytes.Length;
Stream writer = request.GetRequestStream();
writer.Write(bytes, 0, bytes.Length);
writer.Close();

HttpWebResponse response = (HttpWebResponse)request.GetResponse();
StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
result = reader.ReadToEnd();
response.Close();

}
catch (Exception ex)
{
MessageBox.Show(new Form { TopMost = true }, ex.Message);
}

return result;
}