let me comment more on that.
in my app I 1st used (home made) XML serialization, it was overkill
then I used (home made) binary serialization. it was 4 times faster (300%
faster !), bt it's still slow for big data, nedd me to have an OPen/Save
button, and add an exit menu (to save) which is "bad practice" according to
MS convention on PPC
next (soon) we would store our data in SqlServerCe, which is free, present
on all new PPC, and will enable to have data saved all the time, removing
the need for the quit menu.
do the same since the start, store your data in a SqlServerCe DB !