Hi Sebastian,
Thanks for your interests in Syncfusion products.
We have already implemented the integration of DockingManager with DocumentContainer and it is already available in our VOL-4 RC1 release.
Along with this update we are sending you a sample which has an architecture that allows child controls to be docked to any part of the window, as in Visual Studio. The dock panels containing the child elements can then be interactively dragged and dropped to any area within the window. These can also be floated and AutoHidden during run time and also the to switch between the MDI/TDI windows with window switchers. Kindly download the sample from the below mentioned location for more information.
http://www2.syncfusion.com/WPF/DemoSample.zipPlease let us know if you have any queries.
Regards,
Bala.