C# 学习笔记

public class User
    {
        public int UserID { get; set; }
        public string UserName { get; set; }
        public int Age { get; set; }
    }
    public class MyList<T>
    {
        private T[] data;
        public MyList()
        {
            data = new T[0];
        }
        public int Count
        {
            get { return data.Length; }
        }
        public void Add(T t)
        {
            T[] temp = data;
            data = new T[temp.Length + 1];
            temp.CopyTo(data, 0);
            data[data.Length - 1] = t;
        }
        public T this[int index]
        {
            get { return data[index]; }
            set { data[index] = value; }
        }
    }
    public static class Schema
    {
        public delegate bool Condtion<T>(T t);
        public static MyList<T> Search<T>(this MyList<T> myList, Condtion<T> condtion)
        {
            MyList<T> result = new MyList<T>();
            for (int i = 0; i < myList.Count; i++)
            {
                if (condtion(myList[i]))
                {
                    result.Add(myList[i]);
                }
            }
            return result;
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            MyList<User> us = new MyList<User>();
            for (int i = 1; i <= 100; i++)
            {
                us.Add(new User()
                {
                    UserID = i,
                    UserName = "name" + i,
                    Age = i
                });
            }
            var result = us.Search<User>(delegate(User u) { return u.Age > 80; });
            Console.ReadLine();
        }
    }