title: How to install .net standard 2.0 into Visual studio 2017
body: <p>I'm getting the following 4 missing dependencies when trying to build Math.net Numerics in Visual Studio 2017</p>
  
  <pre><code>.NETFramework 4.0
  .NETFramework 4.6.1
  .NETStandard 1.3
  .NETStandard 2.0
  </code></pre>
  
  <p>I cant seem to find these SDKs or binary libraries or any information on how to install them.
  Do I need to install 4 separate frameworks? Or just one SDK?
  Why do I need both .NetStandard 2.0 and 1.3 or both frameworks 4.0 and 4.6.1?</p>
  
  <p>Can somebody point me to a link where of what I need to install?
  Thanks</p>