I will try. Thanks for your reply.

I have this in my Window-Closed Event:
private void XamRibbonWindow_Closed(object sender, EventArgs e)

The loading statement is in the Loaded-Event.

Where did you add the

FileStream fs = new FileStream("filename.xml", FileMode.Create, FileAccess.Write);
dataPresenter .SaveCustomizations(fs);

Hi Garwain,

The solution you suggested works perfectly.

Thanks for your help!

Hi,

for loading a Settings of a XamDataPresenter use something like this:

using (FileStream fs = new FileStream("filename.xml", FileMode.Open, FileAccess.Read))
{
   _dataPresenter .LoadCustomizations(fs);
}

And for saving the settings:

FileStream fs = new FileStream("filename.xml", FileMode.Create, FileAccess.Write);
dataPresenter .SaveCustomizations(fs);

Regards,
Gawain