Hi Markus,
Thanks for the attachment. I am afraid, this information is not sufficient to determine the cause for this exception.
I have attached a
test sample here that saves/restores dock state information in XMLFmtStream using an instance of the AppStateSerializer. Please refer to it and let me know if I have understood your requirements correctly. If not, kindly modify the sample to show the problem and send it back to us so that we could further investigate this issue.
With respect to your questions :
1. It does not appear as if the isolated storage is causing any problems here since you are explicitly setting the storage media as XMLFmtStream in the AppStateSerializer.
2. You have already done this. Setting the storage media as XMLFmtStream in the AppStateSerializer does this job.
Thanks for considering Syncfusion products.
Regards,
Guru Patwal
Syncfusion, Inc.