Hi Martin,
I can see that you are using the Xceed.Wpf.AvalonDock.dll v3.2, which is only available to the "Plus edition" user (or users with a trial).
"Community edition" users have Xceed.Wpf.AvalonDock.dll v3.0.
Please contact the support at Xceed, we will have the fix for you.
In the meantime, issue https://wpftoolkit.codeplex.com/workitem/22456 has been created.
Thanks.
――――
Get more controls, features, updates and technical support with Xceed Toolkit Plus for WPF
I can see that you are using the Xceed.Wpf.AvalonDock.dll v3.2, which is only available to the "Plus edition" user (or users with a trial).
"Community edition" users have Xceed.Wpf.AvalonDock.dll v3.0.
Please contact the support at Xceed, we will have the fix for you.
In the meantime, issue https://wpftoolkit.codeplex.com/workitem/22456 has been created.
Thanks.
――――
Get more controls, features, updates and technical support with Xceed Toolkit Plus for WPF