C# (CSharp) StatePattern2 CeilingFan示例

示例#1

 public void Pull(CeilingFan fan)
 {
     fan.SetState(new Off());
     Console.WriteLine("Fan is turning [OFF]...");
 }

示例#2

 public void Pull(CeilingFan fan)
 {
     fan.SetState(new High());
     Console.WriteLine("Fan is working at [High] speed...");
 }