去掉泛型类型参数:有可能吗

考虑这个类似DAL的代码：

mDealerTypes = Read<Dictionary<string, DealerType>, DealerType>(
() => { return DALFactory.Instance.ReadDealerTypes(cn); },
(c, o) => c.Add(o.DealerTypeKey, o));
mCountries = Read<Dictionary<string, Country>, Country>(
() => { return DALFactory.Instance.ReadDealerTypes(cn); },
(c, o) => c.Add(o.Code, o));
        private C Read<C, T>(Func<SqlConnection, IDataReader> func, Action<C, T> a)
            where C : ICollection, new()
            where T : EntityBase, new()
        {
            C objects = new C();
            using (IDataReader reader = func(connection))
            {
                while (reader.Read())
                {
                    T obj = new T();
                    obj.Init(reader);
                    a(objects, obj);
                }
            }
            return objects;
        }

为了可读性，我想以某种方式更改它，这样存储在集合中的对象就不会在Read<>的类型参数列表中重复两次。

mCountries = Read<Dictionary<string, Country>>(
() => { return DALFactory.Instance.ReadDealerTypes(cn); },
(c, o) => c.Add(o.Code, o));

但是如何重写Read<>然后这可能吗？

私人？？读取（功能，动作a）

public Dictionary<T1, T2> ReadEx<T1, T2>(...) where T2 : EntityBase
{
    return Read<Dictionary<T1, T2>, T2>(...)
}