title: What does @"../.." mean in a path?
body: <p>I am following <a href="http://msdn.microsoft.com/en-us/library/ms171645%28v=vs.100%29.aspx" rel="noreferrer">this tutorial</a> from MSDN.</p>
  
  <p>There's something I saw in the code that I can't understand</p>
  
  <pre><code>    private void PopulateTreeView()
      {
          TreeNode rootNode;
  
          DirectoryInfo info = new DirectoryInfo(@"../.."); // &lt;- What does @"../.." mean?
          if (info.Exists)
          {
              rootNode = new TreeNode(info.Name);
              rootNode.Tag = info;
              GetDirectories(info.GetDirectories(), rootNode);
              treeView1.Nodes.Add(rootNode);
          }
      }
  </code></pre>