in ActiveRecord should SingleOrDefault not be rename to FirstOrDefault to follow the .net 3.5 standards
<a href="http://msdn.microsoft.com/en-us/library/bb549274...." target="_blank">http://msdn.microsoft.com/en-us/library/bb549274.... SingleOrDefault - it should throw a exception if there is more then one
<a href="http://msdn.microsoft.com/en-us/library/bb340482...." target="_blank">http://msdn.microsoft.com/en-us/library/bb340482.... FirstOrDefault - this is the behavior of ActiveRecords singleOrDefault

Just a thought

i have made the change to the activerecord.tt file but i don't know how to make a patch in git

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