static void Main(string[] args)
{
    PurchaseRequest requestDao = new PurchaseRequest(8000.0, "單刀5把");
    PurchaseRequest requestHuaJi = new PurchaseRequest(10000.0, "10把方天畫戟");
    PurchaseRequest requestJian = new PurchaseRequest(80000.0, "5把金絲龍鱗閃電劈");

    Approver manager = new Manager("黃飛鴻");
    Approver financial = new FinancialManager("黃麒英");
    Approver ceo = new CEO("十三姨");

    // 設置職責鏈
    manager.NextApprover = financial;
    financial.NextApprover = ceo;

    // 處理請求
    manager.ProcessRequest(requestDao);
    manager.ProcessRequest(requestHuaJi);
    manager.ProcessRequest(requestJian);

}
// 采購請求
public sealed class PurchaseRequest
{
    // 金額
    public double Amount { get; set; }

    // 產品名字
    public string ProductName { get; set; }

    public PurchaseRequest(double amount, string productName)
    {
        Amount = amount;
        ProductName = productName;
    }
}

//抽象審批人,Handler---相當于“抽象處理者角色”
public abstract class Approver
{
    //下一位審批人，由此形成一條鏈
    public Approver NextApprover { get; set; }

    //審批人的名稱
    public string Name { get; set; }

    public Approver(string name)
    {
        this.Name = name;
    }

    //處理請求
    public abstract void ProcessRequest(PurchaseRequest request);
}

//部門經理----相當于“具體處理者角色” ConcreteHandler
public sealed class Manager : Approver
{
    public Manager(string name) : base(name) { }

    public override void ProcessRequest(PurchaseRequest request)
    {
        if (request.Amount <= 10000.0)
        {
            Console.WriteLine("{0} 部門經理批準了對原材料{1}的采購計劃！", this.Name, request.ProductName);
        }
        else if (NextApprover != null)
        {
            NextApprover.ProcessRequest(request);
        }
    }
}

//財務經理---相當于“具體處理者角色”ConcreteHandler
public sealed class FinancialManager : Approver
{
    public FinancialManager(string name) : base(name) { }

    public override void ProcessRequest(PurchaseRequest request)
    {
        if (request.Amount > 10000.0 && request.Amount <= 50000.0)
        {
            Console.WriteLine("{0} 財務經理批準了對原材料{1}的采購計劃！", this.Name, request.ProductName);
        }
        else if (NextApprover != null)
        {
            NextApprover.ProcessRequest(request);
        }
    }
}

//總裁---相當于“具體處理者角色” ConcreteHandler
public sealed class CEO : Approver
{
    public CEO(string name) : base(name) { }

    public override void ProcessRequest(PurchaseRequest request)
    {
        if (request.Amount > 50000.0 && request.Amount < 300000.0)
        {
            Console.WriteLine("{0} 總裁批準了對原材料 {1} 的采購計劃！", this.Name, request.ProductName);
        }
        else
        {
            Console.WriteLine("這個采購計劃的金額比較大，需要一次董事會會議討論才能決定！");
        }
    }
}