WebClient could not be found

Question

I've already search on Stack Overflow (and google), but can't find the specific answer that solves my problem.

I want to read some content out of a page. I've tried to use Webclient, but that gives me this error:

The type or namespace name 'WebClient' could not be found (ae you missing a using directive or an assembly reference?)

I've tried to search on google how to solve this error, but didn't find a correct answer (I've also tried HttpClient, same result).

How do I make sure that I get the content of his specific page?

Btw, this is what I have right now:

WebClient client = new WebClient();
// Use google as test page
string downloadString = client.DownloadString("http://www.gooogle.com");

And I'm using Visual Studio 2015 Community and ASP.Net v5

Solution

Make sure you have reference to System.dll in your project.

Also either include using System.Net; to usings directive section of the source code where you're planning to use WebClient or use its fully-qualified name, i.e.:

var client = new System.Net.WebClient()

Comments

[Salah Akbari]

Did you add using System.Net; to your using directive?

[M Zeinstra]

@S.Akbari Yes, I tried.. Then I get the error: A using clause must precede all other elements defined in the namespace except extern alias declarations

[Salah Akbari]

OK. Probably you have not placed it at the beginning of the file!

[M Zeinstra]

@S.Akbari I did (see comment at the answer)

[M Zeinstra]

Thanks! var client = new System.Net.WebClient() works perfect! But do you also know why using System.Net; gives me this error?: A using clause must precede all other elements defined in the namespace except extern alias declarations

[Andrey Korneyev]

@MZeinstra using directives should be at the very beginning of the file. Where do you placed it?

[M Zeinstra]

I've placed this <script runat="server">using System.Net;</script> at the very top of my .aspx file

[Andrey Korneyev]

@MZeinstra hmmm... you've mentioned ASP.NET v5 so aspx was last thing that came in my mind. In apsx file you have to use <%@ Import Namespace="System.Net" %> instead.

[M Zeinstra]

Ahh okay, sorry. That works just fine :D What am I using then? You think?

[Mohamad Mahmoud Darwish]

how i can add System.dll