title: IntelliSense: "#using" requires C++/CLI to be enabled
body: <pre><code>#using &lt;mscorlib.dll&gt;
  #using &lt;System.dll&gt;
  using namespace System;
  using namespace System::Text;
  using namespace System::IO;
  using namespace System::Net;
  using namespace System::Net::Sockets;
  using namespace System::Collections;
  </code></pre>
  
  <p>Errors: IntelliSense: "#using" requires C++/CLI to be enabled....</p>
  
  <p>how to fix this prob!?</p>