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　　命令模式是对命令的封装，目的就是要把发出命令和执行命令分割开来。

　　以下的例子，用校长发送命令给学生来来说明命令发送的整个过程，其中老师作为命令的中转站必不可少。

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;namespace ConsoleApplication1
{class Program{/// <summary>/// 命令接受者学生接口/// </summary>public abstract class Student{public abstract void Action();}/// <summary>/// 命令接受者学生A/// </summary>public class StudentA : Student{public override void Action(){Console.WriteLine("StudentA do the action");}}/// <summary>/// 命令接受者学生B/// </summary>public class StudentB : Student{public override void Action(){Console.WriteLine("StudentB do the action");}}/// <summary>/// 命令抽象类/// </summary>public abstract class Command{protected Student student;public Command(Student student){this.student = student;}public abstract void Execute();}/// <summary>/// 具体命令/// </summary>public class ConcreteCommand : Command{public ConcreteCommand(Student student) :base(student){}public override void Execute(){student.Action();}}/// <summary>/// 命令请求者/// </summary>public class Teacher{private Command command;public void SetCommand(Command command){this.command = command;}public void ExecuteCommand(){command.Execute();}}/// <summary>/// 客户端 如校长/// </summary>/// <param name="args"></param>static void Main(string[] args){StudentA sa = new StudentA();StudentB sb = new StudentB();Command c1 = new ConcreteCommand(sa);Command c2 = new ConcreteCommand(sb);Teacher teacher = new Teacher();teacher.SetCommand(c1);teacher.ExecuteCommand();teacher.SetCommand(c2);teacher.ExecuteCommand();}}
}

　　如果要执行一串命令可以用list数据结构进行封装。

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;namespace ConsoleApplication1
{class Program{/// <summary>/// 命令接受者学生接口/// </summary>public abstract class Student{public abstract void Action();}/// <summary>/// 命令接受者学生A/// </summary>public class StudentA : Student{public override void Action(){Console.WriteLine("StudentA do the action");}}/// <summary>/// 命令接受者学生B/// </summary>public class StudentB : Student{public override void Action(){Console.WriteLine("StudentB do the action");}}/// <summary>/// 命令抽象类/// </summary>public abstract class Command{protected Student student;public Command(Student student){this.student = student;}public abstract void Execute();}/// <summary>/// 具体命令/// </summary>public class ConcreteCommand : Command{public ConcreteCommand(Student student) :base(student){}public override void Execute(){student.Action();}}/// <summary>/// 命令请求者/// </summary>public class Teacher{private List<Command> command;public void SetCommand(List<Command> command){this.command = command;}public void ExecuteCommand(){foreach (var c in command){c.Execute();}}}/// <summary>/// 客户端 如校长/// </summary>/// <param name="args"></param>static void Main(string[] args){StudentA sa = new StudentA();StudentB sb = new StudentB();Command c1 = new ConcreteCommand(sa);Command c2 = new ConcreteCommand(sb);List<Command> command = new List<Command>();command.Add(c1);command.Add(c2);Teacher teacher = new Teacher();teacher.SetCommand(command);teacher.ExecuteCommand();}}
}