[C#] Auto-implemented Properties History

• Characteristic
• 封裝，資料保護及隱藏
• .NET Framework 1.0
• Code

    public class AutomaticProperties
    {
        private string _Name;

        public string getName()
        {
            return _Name;
        }

        public void setName(string arg)
        {
            _Name = arg;
        }

        private int _Age;

        public int getAge()
        {
            return _Age;
        }

        public void setAge(int arg)
        {
            _Age = arg;
        }
    }

• .NET Framework 2.0
• Code snippets (propfull)
• Code

public class AutomaticProperties
    {
        private string _Name;

        public string Name
        {
            get
            {
                return _Name;
            }
            set
            {
                _Name = value;
            }
        }

        private int _Age;

        public int Age
        {
            get
            {
                return _Age;
            }
            set
            {
                _Age = value;
            }
        }
    }

• .NET Framework 3.0 ~ 5.0
• Code snippets (prop)
• Code

    public class AutomaticProperties
    {
        public string Name
        {
            get;
            set;
        }

        public int Age
        {
            get;
            set;
        }
    }

• Code 進一步縮減

    public class AutomaticProperties
    {
        public string Name { get; set; }

        public int Age { get; set; }
    }

• Code 唯讀
• 建構值中初始化

    public class AutomaticProperties
    {
        public AutomaticProperties()
        {
            Name = "Lyndon";
            Age = 30;
        }

        public string Name { get; private set; }

        public int Age { get; private set; }
    }

• Code 唯讀，進一步縮減
• 因不是標記成 abstract 或 extern，因此必須宣告主體

    public class AutomaticProperties
    {
        /// 

        /// 直接回傳值
        /// 
        public string Name
        {
            get
            {
                return "Lyndon";
            }
        }

        public int Age
        {
            get
            {
                return 30;
            }
        }
    }

• .NET Framework 6.0
• Code

    public class AutomaticProperties
    {
        public string Name { get; } = "Lyndon";  

        public int Age { get; set; } = 30;
    }

• Ref:
• http://blog.xuite.net/sunnysoap/r/65597736
• http://blog.csdn.net/heqi915/article/details/1589777
• http://alansong.pixnet.net/blog/post/55999534-c%23-get-set-%E5%8F%8A%E8%87%AA%E5%8B%95%E5%B1%AC%E6%80%A7
• https://docs.microsoft.com/zh-tw/dotnet/csharp/programming-guide/classes-and-structs/auto-implemented-properties