title: Count values in Dictionary using LINQ and LINQ extensions
body: <p>I have a dictionary that looks something like this:</p>
  
  <pre><code>Dictionary&lt;String, List&lt;String&gt;&gt;
  
  test1 : 1,3,4,5
  test2 : 2,3,6,7
  test3 : 2,8
  </code></pre>
  
  <p>How can I get a count of all the values using LINQ and LINQ extensions?</p>