c# - new HttpConfiguration(); fails with Nunit but not MsTests -

i trying make test project using nunit test webapi 1 routes. problem exception:

an exception of type 'system.io.filenotfoundexception' occurred in system.net.http.formatting.dll not handled in user code

additional information: not load file or assembly 'newtonsoft.json, version=4.5.0.0, culture=neutral, publickeytoken=30ad4fe6b2a6aeed' or 1 of dependencies. system cannot find file specified.

i have tryed run code mstests (a new testproject) , exception not there.

using system; using microsoft.visualstudio.testtools.unittesting; using system.web.http; using nunit.framework;   namespace unittestproject1 {     [testfixture]     [testclass]     public class unittest1     {         [test]         [testmethod]         public void testmethod1()         {             var config = new httpconfiguration();         }     } } 

so on exemple can run both mstest , nunit. mstest works fine nunit doesn't. knows why ? tryed gallio + mbunit , doesn't work.

more info: frameworktarget: .net 4.0 system.web.http version 4.0.0

just add reference newtonsoft.json , in app.config/web.config add these lines:

<runtime>     <assemblybinding xmlns="urn:schemas-microsoft-com:asm.v1">       <dependentassembly>         <assemblyidentity name="newtonsoft.json" publickeytoken="30ad4fe6b2a6aeed" culture="neutral"/>         <bindingredirect oldversion="0.0.0.0-6.0.0.0" newversion="6.0.0.0"/>       </dependentassembly>     </assemblybinding> </runtime> 

it seems mstests these steps not required nunit are. same modification apply if try create object plain consoleapplication.