代理模式 属性代理

Property Proxy

 public  class Property<T>:IEquatable<Property<T>>  where T:new()
    {
        private T value;
        public T Value 
        { 
            get => value; 
            set 
            {
                if (this.value.Equals(value)) return;
                Console.WriteLine("equals");
                this.value = value;
            }
        }
        public Property(): this(default(T)) //this(Activator.CreateInstance<T>())
        {

        }
        public Property(T t)
        {
            this.value = t;
        }
        public static implicit operator Property<T>(T t) 
        {
            return new Property<T>(t);
        }
        public static implicit operator T(Property<T> property) 
        {
            return property.value;
        }

        public bool Equals(Property<T> obj)
        {
            if (ReferenceEquals(null, obj)) return false;
            if (ReferenceEquals(this, obj)) return true;
            return EqualityComparer<T>.Default.Equals(value, obj.value);
        }
        public override bool Equals(object obj)
        {
            if (ReferenceEquals(null, obj)) return false;
            if (ReferenceEquals(this, obj)) return true;
            if (obj.GetType() != this.GetType()) return false;
            return Equals((Property<T>)obj); 
        }
        public override int GetHashCode()
        {
            return value.GetHashCode();
        }


        public static bool operator ==(Property<T> left, Property<T> right)
        {
            return Equals(left, right);
        }
        public static bool operator !=(Property<T> left, Property<T> right)
        {
            return !Equals(left, right);
        }
    }
    class Creature
    {
        //public Property<int> Agility { get; set; }
        private Property<int> agility = new Property<int>();
        public int Agility 
        {
            get => agility.Value;
            set => agility.Value = value;
        }
    }


    class Program
    {
        static void Main(string[] args)
        {
            var c = new Creature();
            c.Agility = 10;
            c.Agility = 10;
        }
    }