c# – 类中的组方法

var dataAccess = new DataAccess();
var s = dataAccess.GetDailyStatistic(...);

我想将这些方法组合在非静态类中并像这样访问它们

var dataAccess = new DataAccess();
var s = dataAccess.Statistic.GetDaily(...);

实现这一目标的最佳方法是什么？嵌套类？

DataAccess类结构.

public class DataAccess : DataAccessor
{
    public int AddUser(string orderId,string email,string userPassword,string firstName,string lastName,int membershipId,string store,string country)
    public void DeleteBlockedUser(string email)
    public void DeleteUserById(int userId)
    public MembershipTypes GetMembershipType(int membershipId)
    public MembershipTypes GetUserMembershipType(int userId)
    public int? GetUserId(string email)
    public void UpdateUserExpirationDate(string orderId)
    public void UpdateUserCredits(int userId,int membershipId)
    public List<UserEntity> LoadUser(string email,string password)
    public string GetUserIdFromAuthList(string url)
    public UserEntity LoadUserById(int id)
    public UserEntity LoadUserByOrderId(string orderId)
    public void UpdateUser(int id,string password,string lastName)
    public void UpdateStatistic(string id,string url,string agent,string ip,string pageTitle)
    public List<StatisticEntity> GetStatistic(int userId,DateTime from)
    public void GetDailyStatistic(int userId,int days,out string[] arrLabels,out int[] arrValues,out int maxValue)
    public void GetWeeklyStatistic(int userId,DateTime from,out int maxValue)
    ...skip...
}