Create DLL out of a C# Project

[C# Programming]

Hi,

I have a windows application, reporting-tool, wich alows a user to create a XML that later can be generated to a Excel-File.
I am now developing a new function. The user should have the possibility to create a DLL consisting model/generator and also the created XML. By now I have splited the application into two projects:
1. The main windows application with all the forms etc.
2. The model of the excel-report and the classes which generate the report.

Now how can I create the DLL and embed the XML, and all that should be implemented in the windows application project

Thanks in advance

-Haris