如何复制当前实例给一个新实例？

Question

  private data Fanzhuan_odd(data d)
        {
data d2 = d;
d2.m1="www";
}
这样的话，d的m1也改了，如何才能复制一个新实例，只改D2，不改D？

Answer 1

        public class data : ICloneable
        {            public string m1;
            public object Clone()
            {
                return this.MemberwiseClone();
            }        }
        private data Fanzhuan_odd(data d)
        {
            data d2 = (data)d.Clone();
            d2.m1 = "www";
        }

Answer 2

浅拷贝是指将对象中的数值类型的字段拷贝到新的对象中，而对象中的引用型字段则指复制它的一个引用到目标对象。如果改变目标对象中引用型字段的值他将反映在原是对象中，也就是说原始对象中对应的字段也会发生变化。
Program
    {
        public class Sex
        {
            private string _PSex;
            public string PSex
            {
                set
                {
                    _PSex = value;
                }
                get
                {
                    return _PSex;
                }
            }
 
        }        public class Person : ICloneable
        {
            private Sex _pSex = new Sex();
            public string pSex
            {
                set
                {
                    _pSex.PSex = value;
                }
                get
                {
                    return _pSex.PSex;
                }
            }
            private string _PName;
            public string PName
            {
                set
                {
                    this._PName = value;
                }
                get
                {
                    return this._PName;
                }
            }            public void ShowPersonInfo()
            {
            }
            //浅拷贝
            public object Clone()
            {
                return this.MemberwiseClone();
            }
            //深拷贝
            public object DeepClone()
            {
                Person newP = new Person();
                newP.PName = this._PName;
                newP.pSex = this.pSex ;
                return newP;
            }        }
        static void Main(string[] args)
        { }
    }