Facebook Apps - Programmatically post to all of your friend's wall

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Here is the sample code in C# that would post to all of your friends programmatically.

It is a simple C# console application and you need to get the access token using the link https://developers.facebook.com/tools/explorer/

NOTE: The code would work fine, but facebook might restrict you stating that maximum number of posts reached for the day.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.IO;
using System.Web;
using System.Collections.Specialized;
using System.Runtime.Serialization;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;


namespace FriendFeedConsole
{
   class Program
   {
      static void Main(string[] args)
      {
         try
         {
            string access_token = "your access token"; // With publish_stream rights

            string URL = "https://graph.facebook.com/me/friends&";
            URL += "access_token=" + access_token;

            WebClient webClient = new WebClient();

            Stream rstream = webClient.OpenRead(URL);
            StreamReader objReader = new StreamReader(rstream);

            string sLine = "";
            string result = "";

            while (sLine != null)
            {
               sLine = objReader.ReadLine();
               result += sLine;
               result += "\n";
            }
            webClient.Dispose();

            Newtonsoft.Json.Linq.JObject myFriends = Newtonsoft.Json.Linq.JObject.Parse(result);
            Newtonsoft.Json.Linq.JArray arrFriends = (Newtonsoft.Json.Linq.JArray)myFriends["data"];

            for (int i = 0; i < arrFriends.Count; i++)
            {
               Newtonsoft.Json.Linq.JToken token = arrFriends[i];

               string id = token["id"].ToString().Replace("\"", "");
               string name = token["name"].ToString().Replace("\"", "");
               //result = result + "
 " + "id: " + id + " name: " + name + "";

               string message = "Wish you Happy New Year 2012! Visit us at http://www.softwareandfinance.com";
               if (message != null && message.Length > 0)
               {
                     string output = name + " wallpost id: " + postedonwall(id, access_token, message) + "\n";
                     Console.WriteLine(output);
               }
            }            
         }
         catch (WebException ex)
         {
            if (ex.Response is HttpWebResponse)
            {
               switch (((HttpWebResponse)ex.Response).StatusCode)
               {
                  case HttpStatusCode.NotFound:
                     Console.WriteLine("Not Found Exception");
                     break;

                  default:
                     Console.WriteLine(ex.Message + ex.InnerException);
                     break;
               }
            }
         }
         catch (Exception e)
         {
            Console.WriteLine("Unknown Exception");
         }
      }

      static public string postedonwall(string uid, string access_token, string message)
      {
         try
         {
            string URL = "https://graph.facebook.com/" + uid + "/feed";

            NameValueCollection formData = new NameValueCollection();
            formData["access_token"] = access_token;
            formData["message"] = message;

            WebClient webClient = new WebClient();
            byte[] responseBytes = webClient.UploadValues(URL, "POST", formData);
            string result = Encoding.UTF8.GetString(responseBytes);
            webClient.Dispose();

            return result;
         }
         catch (System.Exception ex)
         {
            return "Unable to post: " + ex.Message;
         }

      }

   }
}