creating and Importing .NET assemblies with the Delphi .NET preview

Hi,

Are there any examples of creating an assembly and then using it within a
Dephi.NET project. The currently available info states that they will follow
the same syntax as packages do in Delphi.Win32 but compiling a "package"
with DCCIL produces an error - unsupported language feature: 'PACKAGE'

TIA
Glen Swindell