One of the most important feature to make a data based application reactive is to limit the resultset returned to the GUI. This is usually done in two places: the service implementation that must support some ranking strategy, and the GUI itself that has to leverage these features to show the user just the portion he need ( or he see ). I implemented an almost generic solution for WPF at work that leverage Linfu.DynamicProxy. The strategy consist in filling the (observable)collection with some fake objects that by interception drive the underlying data source to fetch the items in pages just when the user actually see them. I like that solution, but it introduces an extra dependency that I prefer to avoid, and indeed the proxy feature I need are so simple that an entire fully fledged library is too much. So I started a project that aims to be:

• Zero dependency
• Single file ( can add to your project without referencing any dll )
• Never blocking the GUI
• Easy to use
• Data source independent
• MVVM friendly

Here is the first start if you want to see, and contribute with ideas and suggestions. The name stays for Flyweight pattern Fetching strategy. The current solution is under development, don’t download if you need a running solution. I usually post just when things are in some way usable, this is an exercise for me too: presenting a work at its very early stages, in the hope to have contributions to create something *better*

Update: here is some progress