如何确定c#数据访问层中存储过程输出参数的大小属性?

I've made a data access layer modeled shamelessly off of Castle Project's ActiveRecord implementation. In order for it to gain acceptance, it must support the extensive library of stored procedures in use at my organization, which have been written to use every input/output structure imaginable, including return values and output parameters of every conceivable datatype.I've made a data access layer modeled shameless