C# to send attachment

[btu]

I work with axis ,but there are some problems:

1,I run the attachment sample ,and wonder if the client side is other
language ,like c# ,how did they call the service ,as the pass in
parameter is java' DataHandler 
 
2. in my web service , will use a custom bean, and a parameter in the
custom bean's set method, is a custom class , how will i write the wsdd
file, and how will i register them in my code? 
 
please help me, thanks very much.