Thanks a lot for your reply. I download the source code from http://download-codeplex.sec.s-msft.com/Download/SourceControlFileDownload.ashx?ProjectName=balder&changeSetId=4ee4dbd23918.
And I don't know recompile which solution. I find some solutions in the folder balder_4ee4dbd23918\Source\Solutions.
I try to recompile the solution of Samplebrowser.Silverlight5,but dll errors occur.
Now my first question is : which solution I should recompile?
Now my second question is:After you recompile it successfully,you get a assembly System.Windows,what is the version of the dll? Is it 22.214.171.124 or 4.0.6 or else?
I previously develop 3D program using Silverlight4 with Balder. I am a new fish in Silverlight5+Balder.
I have this problem for a week.My english is not very good. Thanks a lot for your next reply.