Telerik Grid and Dynamic filtering Well let me say this is a tale of solving a problem for an existing system with poor test coverage. Ok no test coverage. No I didn't write it. But yes I have to enhance it. It isn't badly done code. I mean there are places it could be improved. Things I would have done differently. New shining technologies we could and would use if it is was being done again but all in all it is straight forward and clean. But it has no working tests, no comments. I want to modify this code with minimal changes to minimize my risk and move on to more interesting things. Oh did I mention the front end is built around Telerik. You either love them or hate them. For me it just depends on the problem but I usually just avoid them. Nice term what does it mean.... A grid with filtering drop downs: We want the filter drop downs with no selected filter value to filter the available options to only available choices based on other filters.