title: Difference between System.Linq.Dynamic and System.Linq?
body: <p>Using ReSharper, I occasionally get quick-fix suggestions for importing a namespace for a LINQ operation.  So given the following code in a brand-new class:</p>
  
  <pre><code>linqToSqlDataContext.Customers.Count();
  </code></pre>
  
  <p>I get a quick-fix drop down as follows:</p>
  
  <p><img src="https://i.stack.imgur.com/Imm0s.png" alt="alt text"></p>
  
  <p>Which should I choose, and what is the difference between them?</p>