Unhandled exception in \Microsoft Roslyn CTP - September 2012\CSharp\OrganizeSolutionCS sample.

Hello,

Trying to figure out why project's documents enumerating code doe not work with Roslyn CTP - September 2012 I'm debugging the sample project form September CTP with name OrganizeSolutionCS. That sample is just simple code iteration through each document for each project in test solution:

private static void Main(string[] args)
{
// The test solution is copied to the output directory when you build this sample.
       var workspace = Workspace.LoadSolution(@"TestSolution\Test.sln");
// Take a snapshot of the original solution.
       var originalSolution = workspace.CurrentSolution;
// Declare a variable to store the intermediate solution snapshot at each step.
       ISolution newSolution = originalSolution;
foreach (var project in originalSolution.Projects)
       {
              // Note how we can't simply iterate over project.Documents because it will return
              // IDocument objects from the originalSolution, not from the newSolution. We need to
              // use the DocumentId (that doesn't change) to look up the corresponding snapshot of
              // the document in the newSolution.
              foreach (var documentId in project.DocumentIds)
              {

…

The code looks simple, but it is just ending without accessing any document in the solution. Then I try to debug the project putting the breakpoint in the line whereoriginalSolution.Projects are enumerated, I'm getting the following error message:

    An unhandled exception of type 'System.Threading.LockRecursionException' occurred in    Roslyn.Services.dll

What is wrong with my Roslyn.Services.dll? How can I make that sample functioning as it is supposed?

 Thanks.