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WebClient.Credentials Property

Gets or sets the network credentials that are sent to the host and used to authenticate the request.

Namespace:  System.Net
Assembly:  System (in System.dll)

Public Property Credentials As ICredentials
Dim instance As WebClient 
Dim value As ICredentials 

value = instance.Credentials

instance.Credentials = value

Property Value

Type: System.Net.ICredentials
An ICredentials containing the authentication credentials for the request. The default is Nothing.

The Credentials property contains the authentication credentials used to access a resource on a host. In most client-side scenarios, you should use the DefaultCredentials, which are the credentials of the currently logged on user. To do this, set the UseDefaultCredentials property to true instead of setting this property.

If the WebClient class is being used in a middle tier application, such as an ASP.NET application, the DefaultCredentials belong to the account running the ASP page (the server-side credentials). Typically, you would set this property to the credentials of the client on whose behalf the request is made.

The following code example uses the user's system credentials to authenticate a request.

Public Shared Sub Main()
        Dim client As New WebClient()

        client.Credentials = CredentialCache.DefaultCredentials

        Dim pageData As [Byte]() = client.DownloadData("")
        Dim pageHtml As String = Encoding.ASCII.GetString(pageData)


    Catch webEx As WebException
    End Try 
End Sub
int main()
      WebClient* client = new WebClient();
      client -> Credentials = CredentialCache::DefaultCredentials;
      Byte pageData[] = client -> DownloadData(S"");
      String* pageHtml = Encoding::ASCII -> GetString(pageData);

   catch (WebException* webEx)

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0