Lifetime of outer variables is aligned with the delegate

 

using System;

public delegate void DelegateClass(out int var);

public class Starter {

    public static void Main() {

        DelegateClass del = MethodA();
        int var;
        del(out var);
        del(out var);
        del(out var);
        Console.WriteLine(var);
    }

    public static DelegateClass MethodA() {
        int increment = 0;
        return delegate(out int var) {
            var = ++increment;
        };
    }
}

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Lifetime of outer variables is aligned with the delegate : delegate « Language Basics « C# / C Sharp

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