Silverlight 2 rc0 Preview Error Message

After installing silverlight tools for  visual studio

I receive the following error message in visual studio 2008 Preview

Derived method 'OnApplyTemplate' in type 'System.Windows.Controls.GridSplitter' from assembly 'System.Windows.Controls.Extended, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' cannot reduce access.

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Error BC30201: Expression expected.

I have a solution that when compiled under the IDE all of the projects build with no issue.  However when compiled with msbuild, I receive the following error message “error BC30201: Expression expected. ” on line 506 and 238 of a vb.net project.

line 505 If Counter => e.NumberOfItems Then
line 238 If Counter => e.NumberOfItems Then

 

I made a typo with => it should be >=.   But why does it compile under the IDE?  If I format the the document then the IDE corrects the typo.  So this looks like another example of vb not compiling the code I wrote.

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