Today I got 2 WSDL files from 2 different vendors who will be calling our web services to do delegated authentication for single sign on. Here's a todo list on what needs to be done to go from WSDL file to having web services that can be used by the 3rd party application as desired.
1. Use wsdl.exe to generate the .cs files.
"C:\Program Files\Microsoft SDKs\Windows\v6.0A\bin\wsdl.exe" "C:\MyWSDLs\third_party.wsdl" /out:"C:\MyCSs" /serverInterface
2. Create an ASP.Net website with 2 new ASMX files for these vendors with codebehinds.
3. Copy the generated .cs files' code (i.e. the ones in the C:\MyCSs directory) into the ASMX codebehind files.