独習C#第3版、P448匿名メソッドは値を返せる

using System;

namespace Chapter01All
{
    class TokumeiMethod
    {
        //デリゲートの宣言
        delegate int CountIt(int limit);
        delegate int CountThat(int limit);
        delegate int CountThis(int limit);
        static void Main()
        {
            //単なるstatic methodの起動
            Console.WriteLine(Count(5));

            //delegateを使ったCountメソッドの起動
            CountIt Cnt = Count;
            Console.WriteLine(Cnt(10));

            //もう一度delegateを使ってCountメソッドの起動
            CountThat count = Count;
            Console.WriteLine(count(15));

            //匿名メソッドを使うと
            CountThis cnt = delegate (int l)
            {
                int wa = 0;
                for (int i = 0; i <= l; i++)
                {
                    Console.Write(i);
                    if (i != l)
                        Console.Write("+");
                    wa += i;
                }
                Console.Write(" = ");
                return wa;
            };
            Console.WriteLine(cnt(20));

        }
        static int Count(int Limit)
        {
            int w = 0;
            for (int i = 0; i <= Limit; i++)
            {
                Console.Write(i);
                if (i != Limit)
                    Console.Write("+");
                w += i;
            }
            Console.Write(" = ");
            return w;
        }
    }
}