總目錄
C# 語法總目錄

1. 自定義集合Collection

Collection可以對添加刪除元素或者添加刪除屬性進行事件響應。

class Person
{public string name;public int age;public Person(){this.name = "";this.age = 0;}public Person(string name, int age){this.name = name;this.age = age;}public override string ToString(){return this.name + "," + this.age;}
}

class PersonCollection : Collection<Person>
{protected override void InsertItem(int index, Person item){base.InsertItem(index, item);Console.WriteLine("insert ele: index id {0},item is {1}",index,item.ToString());}protected override void SetItem(int index, Person item){base.SetItem(index, item);Console.WriteLine("set ele: index id {0},item is {1}", index, item.ToString());}protected override void RemoveItem(int index){base.RemoveItem(index);Console.WriteLine("remove ele: index id {0}", index);}protected override void ClearItems(){base.ClearItems();Console.WriteLine("collect is clear");}
}

internal class Program
{static void Main(string[] args){Console.WriteLine("Hello, World!");PersonCollection people = new PersonCollection();people.Add(new Person());people.Insert(0, new Person("lisi", 50));people[1] = new Person("anger", 19);people.RemoveAt(1);foreach (var item in people){Console.WriteLine(item.ToString());}}
}

其他

方法：string.Compare

string str1 = "help";
string str2 = "Help";
string str3 = "help";int res = string.Compare(str1, str2);
int res1 = string.Compare(str1, str3);
Console.WriteLine(res);     //-1
Console.WriteLine(res1);    //0

總目錄
C# 語法總目錄