asp如何修改xml节点数据

XML code:

<settings>
<labels> <!-- LABELS -->
<!-- you can add as many labels as you want -->
<!-- labels can also be added in data xml file, using exactly the same structure like it is here -->
<label>
<x>0</x> <!-- [0] (Number / Number% / !Number) -->
<y>10</y> <!-- [0] (Number / Number% / !Number) -->
<rotate>false</rotate> <!-- [false] (true / false) -->
<width></width> <!-- [] (Number / Number%) if empty, will stretch from left to right untill label fits -->
<align>center</align> <!-- [left] (left / center / right) -->
<text_color></text_color> <!-- [text_color] (hex color code) button text color -->
<text_size>12</text_size> <!-- [text_size](Number) button text size -->
<text>