uses the reference parameter of a multicast delegate as a counter : Multi cast delegate « delegate « C# / CSharp Tutorial

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C# / CSharp Tutorial » delegate » Multi cast delegate 
9.2.4.uses the reference parameter of a multicast delegate as a counter
using System;

public delegate void DelegateClass(int valCount, ref int refCount);

public class Counter {
    public static void Main() {
        DelegateClass del = (DelegateClass)AddOne + (DelegateClass)AddTwo + (DelegateClass)AddOne;
        int valCount = 0;
        int refCount = 0;
        del(valCount, ref refCount);
        Console.WriteLine("Value count = {0}", valCount)// 0
        Console.WriteLine("Reference count = {0}",refCount)// 4
    }

    public static void AddOne(int valCount,ref int refCount) {
        ++valCount;
        ++refCount;
    }

    public static void AddTwo(int valCount,ref int refCount) {
        valCount += 2;
        refCount += 2;
    }
}
9.2.Multi cast delegate
9.2.1.Demonstrate multicasting
9.2.2.Multicast delegates
9.2.3.Remove delegate from Multicast
9.2.4.uses the reference parameter of a multicast delegate as a counter
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