title: How to construct an instance of Dictionary<string, List<string>>
body: <p>I am trying to code in C#, but I find that I can't construct an instance in this way like C++:</p>
  
  <pre><code>Dictionary&lt;string, List&lt;string&gt;&gt; FirSet =
      new Dictionary&lt;string, List&lt;string&gt;&gt;() {
          { "a", {"ab", "abc"} },
          { "b", {"bc", "bcd"} }
      };
  </code></pre>