title: BeginTransaction with IsolationLevel in EF Core
body: <p>I'm trying to rewrite old library to use EntityFramework Core and I can't figure out how to begin transaction with specific isolation level.</p>
  
  <p>Previously I was able to do something like this:</p>
  
  <pre><code>DbContext.Database.BeginTransaction(IsolationLevel.Snapshot);
  </code></pre>
  
  <p>What is alternative implementation in the EntityFramework Core?</p>