When chosen, calls ExecuteReader instead of ExecuteNonQuery.
With ExecuteReader, Read and NextResult can be called to retrieve rows and next results.
Reference:
http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlcommand.executereader(v=vs.100).aspx
http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqldatareader.read(v=vs.100).aspx
http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqldatareader.nextresult(v=vs.100).aspx
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