I use MVVM Light for my program.

My soft is a part of big program, it is wpf dll.

So, with MVVM light I can use this construction for update all View's from ViewModel's: http://pastie.org/2503236

When I open one dialog and Refresh() work's good, all tables show me smthng.

But, when I close dialog and then open another dialog with Refresh() function in ViewModel, I will get an exception and this strange StackTrace: http://pastie.org/2503243 

Why I have this with threads and what can I do to prevent it? 

Hi Mikhail, 

 Can you send us a sample application that demonstrates this issue so that we investigate this in more detail? 

You can send it to support@xceed.com.  Please include a reference to this forum post in your email. 

I think, I can't, because I my soft is dll part of big application and you can't start it.

That's smthng strange, because I use DispatcherHelper.CheckBeginInvokeOnUI, so there is not another thread, who can create my datagrid.

Maybe I use an old version of DataGrid?

I use 3.5.9616.13400 and my license key starts with DGP32. What is the latest version I can use and where I can get it? Or, maybe I will buy new version? Or something else? 

What a wonderful day =\\\

I tried to use 3.6 version, but so parent application already use 3.5 and register dependcy objects - I can't use other version.

OMG, what can I do? 

And, so, I have the same problem.

Each window in application have there own GUI thread and each use exceed datagrid.

But, if I take to grid only strings, not bool, not guid, not composite objects - all works good.

It's very bad, I think.