Like you said : It works ! I misunderstood the FileShare .. I thought that was for my access. Thank you very much !

Mine are about the same ranging from 7 to 11 MB. Debug versions seem to require about a little than this. You can see why seasoned hardcare programmers are reluctant to switch over to the .net languages. I've always believed that if the workload can go on the programmer to spare the end user of bloated software, slow response etc.. then it should. On the other side of the coin if you don't get with the program you will be left behind (eventually). Art

Hello again Thanks leppie for you code but I am not that good to write a load routine for it. This is my first c# project. I've done saving now with another more simple solution. But it works fine. But I just wanted to try a little with XmlTextReader/Writer -- and again everytime I want to read the file I got an exception. Saving works perfect ... and the file looks fine... Has somebody any idea what I can do ??

Hi Jesse. Yes the order and the Tag-Value of each node is needed -- I am able to save it like you say but I would have to store the Tag separately. I thought there must be a more elegant way to save the TreeView. Thatswhy I tried serialization .. but my knowledge of that is no that deep. :( .. Thanks for your help !!