如果没有T的对象，我如何检查/评估T的确切类型。我知道我的问题可能令人困惑，但考虑一下......publicabstractclassBusiness{publicabstractstringGetBusinessName();}publicclassCasino:Business{publicoverridestringGetBusinessName(){return"CasinoCorp";}}publicclassDrugStore:Business{publicoverridestringGetBusinessName(){return"DrugStorebusiness";