<param name="lhs" />Hi, I just resolved my problem. The problem was that the XML file was not so good generated, so I had to manually edit it.
<summary>Swap data of type <typeparamref name="T"/></summary>
<param name="lhs">left <typeparamref name="T"/> to swap</param>
<param name="rhs">right <typeparamref name="T"/> to swap</param>
<typeparam name="T">The element type to swap</typeparam>
When there is a ref, the generator appends @ (the first line of the code). I just had to remove it and it all goes smooth and quite.
Thanks Eric for taking time to help me :)