I'd like to repost a message that I found in this group almost one year
ago, because it's the exact problem I'm in and there was no solution
offered to this post last year.  (note: I was not the original author
of the below post)

I have similar issue sharing types between the web services, and also
the
client consuming those web services. I have all my custom types defined
in a
seperate assembly and I am using those types as parameter/ return
values in
web methods. I am refering to those custom types in .asmx files using a
using
directive for that assembly(name space). But when the proxy is
generated when
added a web reference(or WSDL tool), those types r geting redefined in
the
proxy classes with their own namespace.

If I remove those defenitions manually and put a using directive at the
top
before the class definiton, there is no incompatibility issue between
the
types. But I need to happen this manually(specifying using directive
for the
assembly containing custom types, instead of REDEFNING them) as I have
several such web services and this manual process is getting even worse

whenever there r any updates to those web service's implementation.

Any ideas how to solve this will be greatly appreciated.