How to read in XML to a textbox

Question

Hi,

i need to read in a XML in a textbox (maybe richtextbox?).
Here´s a snippet of XML:
doc.xml

<doc>
 <fonts>
    <font name="Times New Roman    Regular" family="Times New Roman" style="Regular"/>
    <font name="Times New Roman    Bold" family="Times New Roman" style="Bold" />
    <font name="Arial Italic" family="Arial" style="Italic"/>
    <font name="Arial Bold" family="Arial" style="Bold"/>
 </fonts>
 <parStyle name="Paragraph_1">
      <charStyle fFamily="Arial" fStyle="Italic" fSize="12"/> 
 </parStyle>
 <charStyle>
   <charStyle name="Character_1" fFamily="Times New Roman" fStyle="Bold" />
 </charStyle>

 <text parStyle="Paragraph_1" charStyle="Character_1">
  <p style="Paragraph_1">
    <parStyle>
      <charStyle fFamily="Times New Roman" fStyle="Bold" />
    </parStyle>
    <span style="Character_1">This is the first textline&lt;br/&gt;</span>
  </p>
  <p style="Paragraph_1">
    <span style="None">Here is the next line in other format.</span>
  </p>
 </text>
</doc>

I want to show the text inside the textbox with it`s exact format.
My questions:
1. How can i read in the text-content of the XML and display it in a textbox?
2. Is it possible to read in the text-settings as well and how can i do that?
(3. Some idea for saving this XML from that textbox?)

thank you,
morton