vb.net - System.Net.Http.Formatting.dll in package Microsoft.AspNet.WebApi.Client 5.2.3. doesn't seem to work -

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i have vb.net class library project targeting .net 4.5.1 framework. using visual studio 2013 community edition.

the project library consuming webapi 2 rest api.

as guide using this example.

project's packages.config following:

<?xml version="1.0" encoding="utf-8"?> <packages>   <package id="microsoft.aspnet.webapi.client" version="5.2.3" targetframework="net451" />   <package id="newtonsoft.json" version="7.0.1" targetframework="net451" /> </packages>

project's assemblies references are:

newtonsoft.json, version=7.0.0.0, culture=neutral, publickeytoken=30ad4fe6b2a6aeed, processorarchitecture=msil system system.data system.net.http system.net.http.formatting, version=5.2.3.0, culture=neutral, publickeytoken=31bf3856ad364e35, processorarchitecture=msil   <hintpath>..\..\..\..\packages\microsoft.aspnet.webapi.client.5.2.3\lib\net45\system.net.http.formatting.dll</hintpath> system.xml system.core system.xml.linq system.data.datasetextensions

app.config file is:

<?xml version="1.0" encoding="utf-8"?> <configuration>  <runtime>    <assemblybinding xmlns="urn:schemas-microsoft-com:asm.v1">      <dependentassembly>        <assemblyidentity name="newtonsoft.json" publickeytoken="30ad4fe6b2a6aeed" culture="neutral" />        <bindingredirect oldversion="0.0.0.0-7.0.0.0" newversion="7.0.0.0" />      </dependentassembly>    </assemblybinding>  </runtime>  <startup><supportedruntime version="v4.0" sku=".netframework,version=v4.5.1" />  </startup> </configuration>

the problem system.net.http.httpclient extensions defined in microsoft.aspnet.webapi.client.5.2.3\lib\net45\system.net.http.formatting.dll aren't loaded functions like

system.net.http.httpclientextensions.postasjsonasync(of t)

and

system.net.http.httpclientextensions.postasxmlasync(of t)

aren't available.

in object browser system.net.http.httpclientextensions class defined in system.net.http.formatting assembly under system.net.http namespace grayed out can see in following screenshot:

screenshot

i found several related questions this one provided answers , suggestions in comments didn't work me.

i tried several other recommendations various internet sources, example replacing reference of system.net.http.formatting.dll found in microsoft.aspnet.webapi.client package 1 found in extensions assemblies area didn't work either.

now stuck , don't know how solve this. highly appreciated.

edit

it appears grayed out classes in object browser hidden classes (meaning cannot used directly in user's code) , have nothing problem described.


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