Custom Application Framework Needed (Plugins, Etc)

I'm looking for a C# developer with experience in creating custom application framework for a project of mine. The application will be an office / records management application. The database schema has not yet been defined as I want the application to provide the flexibility needed to use the schema I provide when the time comes. Some general requirements of the software are: 1. The application must support custom "plug-ins" that we will create and add as needed. 2. The application must have a stable core that can safely manage (add/remove/disable/etc) these plugins. For example if a plugin is faulty, it should not cripple the entire application. 3. The plugins must be able to seamlessly integrate into existing core forms or create existing forms (for example, plugin ABC adds new text fields to an existing form about a customer). 4. The application must auto update at the core (less likely) & plugin level (extremely likely). 5. The application must support a plugin "rollback" in the event that a specific plugin causes an application failure. 6. The application must allow newly installed plugins to give a visual cue of the new fields added (for example, a glow of some sort). To summarize, the core or "shell" of the application simply creates forms & does tasks that future plugins will instruct it to do. If you are experienced with this type of application framework development then please bid a general bid amount for this project. We can adjust the amount as needed when the full requirements are provided. This could potentially be a long term project as there are many plugins that are required based on this framework but ONLY if you are reliable and pay very good attention to detail with your work. I cannot accept amateur or untested code, if you constantly provide me with code that does not work I will probably not work with you for the future. ## 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 .net c#