Code
public class student
{
       public student()
       {
          //构造函数
       }
       public bool NewStudent(){};
       public bool DeleteStudent(){};
       punlic bool EditStudent(){};
      
}

接口
/// <summary>
/// 實現接口
/// </summary>
/// <typeparam name="T"></typeparam>
public interface IOperation<T>
{
    /// <summary>
    /// 增加數據
    /// </summary>
    /// <param name="t"></param>
    /// <returns></returns>
    int Insert(T t);
    /// <summary>
    /// 修改數據
    /// </summary>
    /// <param name="t"></param>
    /// <returns></returns>
    int Update(T t);
    /// <summary>
    /// 刪除數據
    /// </summary>
    /// <param name="Id"></param>
    /// <returns></returns>
    int Delete(string Id);
}



    #region IOperation<User> 成員

public class UserDAL : IOperation<User>
{   

 public int Insert(User t)
    {
       
    }

    public int Update(User t)
    {
        
    }

    public int Delete(string Id)
    {
        
    } 

 

    }



#endregion