title: Install Nuget Package error "The path is not of a legal form"
body: <p>When trying to install the NuGet Package <strong>RestSharp</strong> I get the error <code>The path is not of a legal form</code> and the package is not installed.</p>
  
  <p>When installing from the console using <code>Install-Package RestSharp</code>, there are a lot of the following messages: </p>
  
  <blockquote>
    <p>The item
    C:\Users\myName\Source\Workspaces\Project\Solution\packages\RestSharp.105.1.0\lib\net35\RestSharp.dll
    could not be found in your workspace, or you do not have permission to
    access it.</p>
  </blockquote>
  
  <p>This happens with the newly released Visual Studio 2015 (community edition).</p>