title: C# Declaration Question
body: <p>I am very new to c#, but I am learning more every day.</p>
  
  <p>I am wondering what the following means:</p>
  
  <pre><code>private DataIdentifier dataIdentifier;
  </code></pre>
  
  <p>Why do they write like this? It is almost the same name but they use big D in the first word.</p>