รบกวนหน่อยครับเกี่ยวกับ C# ส่งค่าไป XML หามาหลายวิธีแล้วอ่ะ

<?xml version="1.0" encoding="UTF-8"?>

  <aruba command="user_add">
    <ipaddr>IP-address_of_the_user</ipaddr>
    <macaddr>MAC-address_of_the_user</macaddr>
    <name>User_Name</name>
    <role>Role_Name</role>
    <session_timeout>Session_timeout</session_timeout>
    <key>Shared_Key</key>
    <authentication>MD5|SHA-1|cleartext</authentication>                         
    <version>1.0</version>
  </aruba>

  <aruba command="user_delete">
    <ipaddr>IP-address_of_the_user</ipaddr>
    <macaddr>MAC-address_of_the_user</macaddr>
    <name>User_Name</name>
    <key>Shared_Key</key>
    <authentication>MD5|SHA-1|cleartext</authentication>                        
    <version>1.0</version>
  </aruba>

<aruba command="user_authenticate">
    <ipaddr>IP-address_of_the_user</ipaddr>
    <macaddr>MAC-address_of_the_user</macaddr>
    <name>User_Name</name>
    <password>Password_for_the_user</password>
    <key>Shared_Key</key>
    <authentication>MD5|SHA-1|cleartext</authentication>                       
    <version>1.0</version>
  </aruba>

  <aruba command="user_blacklist">
    <ipaddr>IP-address_of_the_user</ipaddr>
    <macaddr>MAC-address_of_the_user</macaddr>
    <name>User_Name</name>
    <key>Shared_Key</key>
    <authentication>MD5|SHA-1|cleartext</authentication>                         
    <version>1.0</version>
  </aruba>