title: How to update .NETStandard in VS 2017?
body: <p>When installing TweetSharp I get this error message:</p>
  
  <pre><code>Install-Package : Package TweetSharp 2.3.1 is not compatible with netstandard1.4 (.NETStandard,Version=v1.4). Package TweetSharp 2.3.1 supports:
    - net20 (.NETFramework,Version=v2.0)
    - net35 (.NETFramework,Version=v3.5)
    - net40 (.NETFramework,Version=v4.0)
    - sl4 (Silverlight,Version=v4.0)
    - sl4-wp (Silverlight,Version=v4.0,Profile=WindowsPhone)
    - sl4-wp71 (Silverlight,Version=v4.0,Profile=WindowsPhone71)
  </code></pre>
  
  <p>I have tried updating .NETStandard to the most recent release being 2.0 but that doesn't work.</p>
  
  <p>I have also tried using the command 'nuget.exe locals -clear all' that also doesn't work.</p>
  
  <p>How can I update netstandard1.4 to one supported by TweetSharp?</p>
  
  <p>Thank you.</p>