How Would I Add This To A Wpf Treeview

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WPF

C#5.0

Hi guys, how would i display the below xml to a WPF TreeView and it must display as follows

>Category Name (Easy Puzzle)
>Puzzle Name
>Category Name (Medium Puzzle)
>Puzzle Name
>Category Name (Hard Puzzle)
>Puzzle Name

<SudokuLibrary xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <Puzzles>
    <SudokuPuzzle>
      <Category>Easy Puzzle</Category>
      <Name>Easy Puzzle</Name>
      <Rank>3</Rank>
      <Format>
        <string>6,0,0,5,0,4,7,0,0</string>
        <string>4,9,5,0,0,8,3,6,0</string>
        <string>1,0,7,0,0,0,0,0,0</string>
        <string>0,5,0,0,0,1,4,2,8</string>
        <string>0,0,0,2,0,9,0,0,0</string>
        <string>3,2,1,8,0,0,0,5,0</string>
        <string>0,0,0,0,0,0,5,0,3</string>
        <string>0,1,3,6,0,0,8,7,4</string>
        <string>0,0,8,1,0,3,0,0,2</string>
      </Format>
      <Solution>
        <string>6,3,2,5,1,4,7,8,9</string>
        <string>4,9,5,7,2,8,3,6,1</string>
        <string>1,8,7,9,3,6,2,4,5</string>
        <string>7,5,9,3,6,1,4,2,8</string>
        <string>8,6,4,2,5,9,1,3,7</string>
        <string>3,2,1,8,4,7,9,5,6</string>
        <string>9,7,6,4,8,2,5,1,3</string>
        <string>2,1,3,6,9,5,8,7,4</string>
        <string>5,4,8,1,7,3,6,9,2</string>
      </Solution>
      <SaveState>
        <string>6,0,0,5,0,4,7,0,0</string>
        <string>4,9,5,0,0,8,3,6,0</string>
        <string>1,0,7,0,0,0,0,0,0</string>
        <string>0,5,0,0,0,1,4,2,8</string>
        <string>0,0,0,2,0,9,0,0,0</string>
        <string>3,2,1,8,0,0,0,5,0</string>
        <string>0,0,0,0,0,0,5,0,3</string>
        <string>0,1,3,6,0,0,8,7,4</string>
        <string>0,0,8,1,0,3,0,0,2</string>
      </SaveState>
    </SudokuPuzzle>
    <SudokuPuzzle>
      <Category>Medium Puzzle</Category>
      <Name>Medium Puzzle</Name>
      <Rank>3</Rank>
      <Format>
        <string>9,0,0,0,4,8,7,0,0</string>
        <string>0,0,2,0,0,6,4,0,0</string>
        <string>3,7,0,0,0,0,0,6,0</string>
        <string>0,3,8,0,0,5,0,0,0</string>
        <string>7,0,0,0,8,0,0,0,5</string>
        <string>0,0,0,2,0,0,6,3,0</string>
        <string>0,6,0,0,0,0,0,8,2</string>
        <string>0,0,5,3,0,0,1,0,0</string>
        <string>0,0,3,8,2,0,0,0,6</string>
      </Format>
      <Solution>
        <string>9,5,6,1,4,8,7,2,3</string>
        <string>8,1,2,7,3,6,4,5,9</string>
        <string>3,7,4,9,5,2,8,6,1</string>
        <string>6,3,8,4,9,5,2,1,7</string>
        <string>7,2,1,6,8,3,9,4,5</string>
        <string>5,4,9,2,7,1,6,3,8</string>
        <string>4,6,7,5,1,9,3,8,2</string>
        <string>2,8,5,3,6,7,1,9,4</string>
        <string>1,9,3,8,2,4,5,7,6</string>
      </Solution>
      <SaveState>
        <string>9,0,0,0,4,8,7,0,0</string>
        <string>0,0,2,0,0,6,4,0,0</string>
        <string>3,7,0,0,0,0,0,6,0</string>
        <string>0,3,8,0,0,5,0,0,0</string>
        <string>7,0,0,0,8,0,0,0,5</string>
        <string>0,0,0,2,0,0,6,3,0</string>
        <string>0,6,0,0,0,0,0,8,2</string>
        <string>0,0,5,3,0,0,1,0,0</string>
        <string>0,0,3,8,2,0,0,0,6</string>
      </SaveState>
    </SudokuPuzzle>
    <SudokuPuzzle>
      <Category>Hard Puzzle</Category>
      <Name>Hard Puzzle</Name>
      <Rank>3</Rank>
      <Format>
        <string>1,0,0,0,9,6,0,0,5</string>
        <string>6,0,0,0,0,0,1,7,4</string>
        <string>0,2,0,0,0,0,0,0,3</string>
        <string>0,5,0,0,0,2,0,0,9</string>
        <string>0,0,0,0,6,0,0,0,0</string>
        <string>8,0,0,3,0,0,0,5,0</string>
        <string>9,0,0,0,0,0,0,6,0</string>
        <string>5,1,7,0,0,0,0,0,2</string>
        <string>3,0,0,5,4,0,0,0,1</string>
      </Format>
      <Solution>
        <string>1,4,3,7,9,6,8,2,5</string>
        <string>6,9,5,2,3,8,1,7,4</string>
        <string>7,2,8,4,5,1,6,9,3</string>
        <string>4,5,6,8,7,2,3,1,9</string>
        <string>2,3,1,9,6,5,7,4,8</string>
        <string>8,7,9,3,1,4,2,5,6</string>
        <string>9,8,4,1,2,3,5,6,7</string>
        <string>5,1,7,6,8,9,4,3,2</string>
        <string>3,6,2,5,4,7,9,8,1</string>
      </Solution>
      <SaveState>
        <string>1,0,0,0,9,6,0,0,5</string>
        <string>6,0,0,0,0,0,1,7,4</string>
        <string>0,2,0,0,0,0,0,0,3</string>
        <string>0,5,0,0,0,2,0,0,9</string>
        <string>0,0,0,0,6,0,0,0,0</string>
        <string>8,0,0,3,0,0,0,5,0</string>
        <string>9,0,0,0,0,0,0,6,0</string>
        <string>5,1,7,0,0,0,0,0,2</string>
        <string>3,0,0,5,4,0,0,0,1</string>
      </SaveState>
    </SudokuPuzzle>
  </Puzzles>
</SudokuLibrary>