use LINQ expression

git-svn-id: svn://svn.code.sf.net/p/autowikibrowser/code/AWB@10380 5227b50d-9349-4574-b055-4b0a7525e11c
Reduce nesting

git-svn-id: svn://svn.code.sf.net/p/autowikibrowser/code/AWB@10381 5227b50d-9349-4574-b055-4b0a7525e11c