SamSaffron/dapper-dot-net — pull request #29 by danzel (2012-03-22 22:50:58+00:00)
Title: Throw an exception when asked to Delete<MyType>(null)

rather than trying to as in Npgsql it will delete the whole table.

http://code.google.com/p/dapper-dot-net/issues/detail?id=90