C# dotnet sample application

I'm looking for a small demo application that will demonstrate programers skills. As such the requirements are quite broad. The one departure from standard application architecture and that will require new thought and design is that I want an Add only database. Meaning that when you would have done an update you insert an new record with the same record ID and a current time stamp. Similar for Delete you insert a new record with the appropreate record ID timestamp and a delete flag set. I want to see examples of referential integrity in the database ie triggers or defined relationships. The sample should include Cascading Delete, Resticted Delete. The application must allow to browse and search records. Display Parent, Child, GrandChild data. Allow for the user to view all changes to a logical record and select any point in time to make the current record. Ideally this would be a Web application with a SQLExpress database but a winforms App and SQL Server are acceptable as well ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform Windows XP SQLExpress .Net 2.0 SQLServer