public AstRoot AcquireReadLock(Guid treeUserId)
{
if (TreeLock != null)
{
if (TreeLock.AcquireReadLock(treeUserId))
{
return(_astRoot);
}
Debug.Fail(String.Format(CultureInfo.CurrentCulture, "Unable to acquire read lock for user {0}", treeUserId));
}
return(null);
}