class Client void Main Handler h1 new ConcreteHandler1 Handler h2 new

class Client
{
    void Main()
    {
        Handler h1 = new ConcreteHandler1();
        Handler h2 = new ConcreteHandler2();
        h1.Successor = h2;
        h1.HandleRequest(2);
    }
}
abstract class Handler
{
    public Handler Successor { get; set; }
    public abstract void HandleRequest(int condition);
}
 
class ConcreteHandler1 : Handler
{
    public override void HandleRequest(int condition)
    {
        if (condition == 1)
        {
            // обработка;
        }
        else if (Successor != null)
        {
            Successor.HandleRequest(condition);
        }
    }
}
 
class ConcreteHandler2 : Handler
{
    public override void HandleRequest(int condition)
    {
        if (condition==2)
        {
            // обработка;
        }
        else if (Successor != null)
        {
            Successor.HandleRequest(condition);
        }
    }
}