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DocumentSource bug with 3.5 and 4.0

Dec 3, 2010 at 12:52 PM

When I use DockingManager in .NET 3.5, at design time on wpf window, it throws this error "Cannot find type System.Collections.ObjectModel.ReadOnlyObservableCollection`1 in module System.dll.". But  at run time things seem fine with respect to showing of dockpanel.. But DocumentSource binding on it has no effect so binding doesnot work.Where as in .NET4.0, things work fine. Any idea whats happening?

Sep 3, 2012 at 10:38 AM

I am also having this issue after downgrading my project from .net 4 to .net 3.5. If there is a way around this error that would be great. I would love to be able to see my window in designer view again.