HttpClient does not exist in net 4 0 what can I do

Question

Ok i edited my code i dont get errors but the messageBox Show return nothing empty box  Maybe i need to add something in the referrer string   I didnt understand what is the referrer and what should i put there  And i have a key already im using it in my code  The key is a long string and im using it in my code i dont use with the referrer  Why it dosent translate the word  hi     using System  using System Collections Generic  using System ComponentModel  using System Data  using System Drawing  using System Linq  using System Text  using System Windows Forms  using System Globalization  using System IO  using System Net  using System Web  using System Web Script Serialization      namespace WindowsFormsApplication2       public partial class Form1   Form               private JavaScriptSerializer  Serializer   new JavaScriptSerializer             public Form1                         InitializeComponent                string f   TranslateText  hi    English    German                        MessageBox Show f                      private void Form1 Load object sender  EventArgs e                               public string TranslateText string inputText  string sourceLanguage  string destinationLanguage  string referrer  string apiKey                            string requestUrl   string Format                       http   ajax googleapis com ajax services language translate v 1 0 amp q  0  amp langpair  1   2  amp key  3                         HttpUtility UrlEncode inputText                        sourceLanguage ToLowerInvariant                         destinationLanguage ToLowerInvariant                         apiKey                                     try                                       HttpWebRequest http    HttpWebRequest HttpWebRequest Create requestUrl                       http Referer   referrer                      HttpWebResponse response    HttpWebResponse http GetResponse                        using  StreamReader sr   new StreamReader response GetResponseStream                                                   string responseJson   sr ReadToEnd                            var translation   this  Serializer Deserialize lt Milkshake Integration Google GoogleAjaxResponse lt Milkshake Integration Google Translate TranslationResponse gt  gt  responseJson                            if  translation    null  amp  amp  translation ResponseData    null  amp  amp  translation ResponseData ResponseStatus    HttpStatusCode OK                                                        return translation ResponseData TranslatedText                                                    else                                                       return String Empty                                                                                catch                                       return String Empty

User · Answer

Agreeing with TrueWill s comment on a separate answer  the best way I ve seen to use system web http on a  NET 4 targeted project under current Visual Studio is Install-Package Microsoft AspNet WebApi Client -Version 4 0 30506

User · Answer

Referring to the answers above  I am only adding this to help clarify things   It is possible to use HttpClient from  Net 4 0  and you have to install the package from here  However  the text is very confusion and contradicts itself       This package is not supported in Visual Studio 2010  and is only required for projects targeting  NET Framework 4 5  Windows 8  or Windows Phone 8 1 when consuming a library that uses this package    But underneath it states that these are the supported platforms   Supported Platforms     NET Framework 4 Windows 8 Windows Phone 8 1 Windows Phone Silverlight 7 5 Silverlight 4 Portable Class Libraries   Ignore what it ways about targeting  Net 4 5   This is wrong   The package is all about using HttpClient in  Net 4 0   However  you may need to use VS2012 or higher  Not sure if it works in VS2010  but that may be worth testing

User · Answer

You can use WebClient    Or  if you need more fine-grained control over the request  HttpWebRequest Or  HttpClient in System Net Http dll    Here s a  translation  to HttpWebRequest  needed rather than WebClient in order to set the referrer     Uses System Net and System IO        HttpWebRequest http    HttpWebRequest HttpWebRequest Create requestUrl       http Referer   referrer      HttpWebResponse response    HttpWebResponse  http GetResponse        using  StreamReader sr   new StreamReader response GetResponseStream                   string responseJson   sr ReadToEnd               more stuff

User · Answer

I ve used HttpClient in  NET 4 0 applications on numerous occasions  If you are familiar with NuGet  you can do an Install-Package Microsoft Net Http to add it to your project  See the link below for further details   http   nuget org packages Microsoft Net Http

User · Answer

read this     Portable HttpClient for  NET Framework and Windows Phone  see paragraph Using HttpClient on  NET Framework 4 0 or Windows Phone 7 5 http   blogs msdn com b bclteam archive 2013 02 18 portable-httpclient-for-net-framework-and-windows-phone aspx

[c#] HttpClient does not exist in .net 4.0: what can I do?

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