title: CryptographicBuffer equivalent in .Net Standard?
body: <p>I'm trying to migrate a couple of cryptographic functions that I had in WinRT like:</p>
  
  <pre><code>CryptographicBuffer.GenerateRandom(256);
  </code></pre>
  
  <p>I'm trying to find a similar function in .net Core or .net Standard but cannot find it. Does anybody know if there is a equivalent function or do I have to build my own?</p>
  
  <p>Thanks</p>