Use VB.Net to edit xml

[rhuntsman]

I have the following XML file:

<File>
   <Users>
      <User Name="TestUser">
         <Option Name="Pass">Password</Option>
         <Option Name="Group">Group</Option>
         <Permissions>
            <Option Name="FileRead">1</Option>
            <Option Name="FileWrite">0</Option>
         </Permissions>
      </User>
      <User Name="TestUser2">
         <Option Name="Pass">Password2</Option>
         <Option Name="Group">Group</Option>
         <Permissions>
            <Option Name="FileRead">1</Option>
            <Option Name="FileWrite">0</Option>
         </Permissions>
      </User>
   </Users>
</File>

I need to add another User Element with everything in it. I cannot for the life of me figure out how to do this. I have been working on this for the last couple days. I am new to vb, so please bear with me. All help is greatly appreciated.

[rhuntsman]

Anyone? I would really appreciate any help.