What are these extra parameters in my ASMX Proxy Methods?

Question

If I add a web reference from a .NET 1.1 client to a WCF service, the proxy methods generated at the client contain an extra parameter ending with the suffix \'Specified\' f

Answer 1

.NET 1.1 Web services don't have a concept of null so WCF is generating these extra properties for you. fooSpecified = false means foo is really null.