關於Lambda表達式（箭頭函數）的get屬性訪問器和常規的get屬性訪問器的差異

如下代碼示例所示 d1 d2 相等，d3 d4 不等，因爲賦值形式的訪問器只是new一個實例後賦值，而lambda形式（箭頭函數），則是把箭頭右側是當方法體來執行，即每次都 new一個新的實例

class Dog
    {
        public Dog()
        {
            this.Name = Guid.NewGuid().ToString("N");
        }

        public string Name { get; set; }
        public DateTime CreateTime { get; set; } = DateTime.Now;
    }

    class DogHouse
    {
        public static Dog Dog1 { get; } = new();
        public static Dog Dog2 => new();
    }

    internal class Program
    {


        static void Main(string[] args)
        {
            var d1 = DogHouse.Dog1;
            var d2 = DogHouse.Dog1;
            var d3 = DogHouse.Dog2;
            var d4 = DogHouse.Dog2;
            var isSame1 = d1 == d2;
            var isSame2 = d3 == d4;
            Console.WriteLine($"isSame1:{isSame1},isSame2:{isSame2}");
        }
    }