You mean "deprecated". No, it's not, and if it were, it would still show up.
System.ServiceProcess is not a class, it's a namespace. System.ServiceBase
is a class. You need to add a reference to the "System.ServiceProcess"
assembly in your project. Note that Visual Studio Express does not have a
"Windows Service" project type, but you can still write them manually by
creating a console application and deriving a class from ServiceBase.