如何在.NET中实现匿名方法中的捕获值

using System;

class Program
{
    static void Main()
    {
        int x = 10;

        Func<int, int> func = delegate (int y)
        {
            return x + y;
        };

        Console.WriteLine(func(5)); // 输出 15
    }
}

using System;

class Program
{
    static void Main()
    {
        int x = 10;

        Func<int, int> func = (int y) => x + y;

        Console.WriteLine(func(5)); // 输出 15
    }
}