How do I make calls to a REST api using c#? -

this code have far:

using system; using system.collections.generic; using system.linq; using system.text; using system; using system.net.http; using system.web; using system.net; using system.io;  namespace consoleprogram {     public class class1     {         private const string url = "https://sub.domain.com/objects.json?api_key=123";         private const string data = @"{""object"":{""name"":""name""}}";          static void main(string[] args)         {             class1.createobject();         }          private static void createobject()         {             httpwebrequest request = (httpwebrequest)webrequest.create(url);             request.method = "post";             request.contenttype = "application/json";              request.contentlength = data.length;             streamwriter requestwriter = new streamwriter(request.getrequeststream(), system.text.encoding.ascii);             requestwriter.write(data);             requestwriter.close();               try {                 webresponse webresponse = request.getresponse();                 stream webstream = webresponse.getresponsestream();                 streamreader responsereader = new streamreader(webstream);                 string response = responsereader.readtoend();                 console.out.writeline(response);                 responsereader.close();             } catch (exception e) {                 console.out.writeline("-----------------");                 console.out.writeline(e.message);             }          }     } } 

the problem think exception block being triggered (because when remove try-catch, server error (500) message. don't see console.out lines put in catch block.

my console:

the thread 'vshost.notifyload' (0x1a20) has exited code 0 (0x0). thread '<no name>' (0x1988) has exited code 0 (0x0). thread 'vshost.loadreference' (0x1710) has exited code 0 (0x0). 'consoleapplication1.vshost.exe' (managed (v4.0.30319)): loaded 'c:\users\l. preston sego iii\documents\visual studio 11\projects\consoleapplication1\consoleapplication1\bin\debug\consoleapplication1.exe', symbols loaded. 'consoleapplication1.vshost.exe' (managed (v4.0.30319)): loaded 'c:\windows\microsoft.net\assembly\gac_msil\system.configuration\v4.0_4.0.0.0__b03f5f7f11d50a3a\system.configuration.dll', skipped loading symbols. module optimized , debugger option 'just code' enabled. first chance exception of type 'system.net.webexception' occurred in system.dll thread 'vshost.runparkingwindow' (0x184c) has exited code 0 (0x0). thread '<no name>' (0x1810) has exited code 0 (0x0). program '[2780] consoleapplication1.vshost.exe: program trace' has exited code 0 (0x0). program '[2780] consoleapplication1.vshost.exe: managed (v4.0.30319)' has exited code 0 (0x0). 

i'm using visual studio 2011 beta, , .net 4.5 beta.

the asp.net web api has replaced wcf web api mentioned.

i thought i'd post updated answer since of these responses 2012, , thread 1 of top results when doing google search "call restful service c#".

current guidance microsoft use microsoft asp.net web api client libraries consume restful service. available nuget package, microsoft.aspnet.webapi.client.

here's how example when implemented using asp.net web api client library:

using system; using system.collections.generic; using system.net.http; using system.net.http.headers;  namespace consoleprogram {     public class dataobject     {         public string name { get; set; }     }      public class class1     {         private const string url = "https://sub.domain.com/objects.json";         private string urlparameters = "?api_key=123";          static void main(string[] args)         {             httpclient client = new httpclient();             client.baseaddress = new uri(url);              // add accept header json format.             client.defaultrequestheaders.accept.add(             new mediatypewithqualityheadervalue("application/json"));              // list data response.             httpresponsemessage response = client.getasync(urlparameters).result;  // blocking call!             if (response.issuccessstatuscode)             {                 // parse response body. blocking!                 var dataobjects = response.content.readasasync<ienumerable<dataobject>>().result;                 foreach (var d in dataobjects)                 {                     console.writeline("{0}", d.name);                 }             }             else             {                 console.writeline("{0} ({1})", (int)response.statuscode, response.reasonphrase);             }           }     } } 

for more details, including other examples, go here: http://www.asp.net/web-api/overview/web-api-clients/calling-a-web-api-from-a-net-client

this blog post may useful: http://johnnycode.com/2012/02/23/consuming-your-own-asp-net-web-api-rest-service/