Tree view in Wpf(xaml)

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C#3.0

C#

WPF

I have a problem here ;
I've create a treeview in c# like this code ,but
How can I do this in wpf (xaml); ?:confused:

public void PopulateTreeView(  string dirValue, TreeNode parentNode )
     {
        /*   dirValue = inputTextBox.Text
             parentNode = directoryTreeView.Nodes[0] ..
         *
            directoryTreeView is a Treeview
         */


         // array stores all subdirectories in the directory
        string[] directoryArray =  Directory.GetDirectories( dirValue);

        try
        {
           // subdirectories are present
           if ( directoryArray.Length != 0 )
           {
              //  create new TreeNode,

              foreach ( string directory in directoryArray )
              {
                  // substringDirectory is a string defined in generall
          substringDirectory = Path.GetFileNameWithoutExtension(directory );


                  // current directory
                 TreeNode myNode = new TreeNode( substringDirectory );

                 // add current directory node to parent node
                 parentNode.Nodes.Add( myNode );

                 // recursive populate
                 PopulateTreeView( directory, myNode );
              }
           }
        }


        catch ( UnauthorizedAccessException )
        {
           parentNode.Nodes.Add( "Access denied !" );
        }
     }

Edit:: Thanks for help, but I really didn't understand what do you guys mean ! can you post snippet code ?(cause I'm new to xaml). :rose: