委托、匿名方法、Lambda表达式

delegate int AdditionDelegate(int x, int y);

class DelegateLambda
{
    // 委托
    public int AddVer1(int x, int y)
    {
        AdditionDelegate addDelegate = new AdditionDelegate(Addition);
        return addDelegate(x, y);
    }
    private int Addition(int x, int y)
    {
        return x + y;
    }

    // 匿名方法
    public int AddVer2(int x, int y)
    {
        AdditionDelegate addDelegate = delegate(int _x, int _y) { return _x + _y; };
        return addDelegate(x, y);
    }

    // Lambda表达式
    public int AddVer3(int x, int y)
    {
        AdditionDelegate addDelegate = (_x, _y) => _x + _y;
        return addDelegate(x, y);
    }
}