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();
}
}