如何确定SSIS数据集中的行数

I frequently encounter a situation in SSIS packages where I run a SQL Command to return a set of rows from an ADO connection. There are cases where I want to branch based on the number of rows returned. The ado resultset is stored in an SSIS 'object' datatype. Is there a way in SSIS expression or Script component to get that count of rows? I frequently encounter a situation in SSIS pack