????62.  ???????????????Dispose()??Finalize()??????????
????63.  ???????±????д?System.Object?????????System.Object????????????????????????as????
???????滻??
class SomeClass
{}
//????
class MyClass<T>
{
void SomeMethod(T t)
{
object temp = t;
SomeClass obj = (SomeClass)temp;
}
}
// ?????
class MyClass<T> where T : SomeClass
{
void SomeMethod(T t)
{
SomeClass obj = t;
}
}
????64.  ?????????2?????????????????????????????????????????????滻???
????public class Customer
????{…}
????//????
????public interface IList<T> where T : Customer
????{…}
????//?????
????public interface ICustomerList : IList<Customer>
????{…}
????65.  ??????????????巽??????????????
????66.  ??????????C#?????????generics???????????