I have an idea for avoiding zombie processes, which should be implemented to both .NET projects (WinForms and WPF):

There should be a Launcher application which doesn't create a window, but starts the Client (GUI). It should also read the settings of the GUI somehow, in order to get the file name of the wallet, the daemon, and the miner. After the Client exits, the Launcher should check whether those processes are still running, and if they are, it should just simply kill them. (If a crash has happened already, then it doesn't really matter whether the wallet and blockchain states are saved.)

TL;DR: There should be a wrapper called 'Launcher' for the GUI which kills all the related processes if the Client crashes.


EDIT: In order to implement transactions with dates visible, I would have to retrieve the information of a block height, which - with the current, process-wrapping, event-based reply system - is a lot of hassle. I would be very happy if the API evolved to a level which could be usable. (It should not return "busy" whether it hasn't yet synchronized with the network.)