I've done some searching, and I can't seem to find a documented
approach.

We have a mainframe that is able to do RPC via SOAP.  Our client
is .Net.  When the server returns row data, it can only (apparently)
produce arrays of a type (I'm guessing it's a struct on their end).
What we want to do is convert the arrays to DataSets so they are more
consumable in our application.  We also want to be able to send
DataSets for multiple row updates, etc.  I've tried to get the
mainframe guys to alter the outgoing schema to say
msdata:IsDataSet="true", but it doesn't look like they have that
control on their end.

Our app creates dynamic proxy code compiled into cached assemblies at
run time, so I don't have a lot of control over the proxy code except
that I could (if I have to) alter the code that produces the proxy
code.  I'm looking for a better solution.

The one thing I've seen that seems like it might be able to do what I
want is a custom SOAP extension.  I'm not sure how I get to the WSDL
with that for the proxy code generation though.

Has anyone tried this or something else to solve the same problem?

TIA

Brian