一个用来传递窗口数据的类：
public  class ShareClass
    {
        public class ShareData
        {

            int _A;

            public int A
            {
                get { return _A; }
                set { _A = value; }
            }
            string _B;

            public string B
            {
                get { return _B; }
                set { _B = value; }
            }
            string _C;

            public string C
            {
                get { return _C; }
                set { _C = value; }
            }
           
        }

    }
数据接收方是form4   数据传送方是AddItem
所以我在form4中写了
 public Form4(ShareClass.ShareData data2)
        {
            //InitializeComponent();
            ss = data2.B;
}

然后在program.cs中写了 static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form4());
        }

然后这样就出现错误了：form4不支持0个参数的重载


所以我 又在form4中加了个 public Form4()
        {
            //InitializeComponent();
           
}


可是。。。这样数据就不能传递过来了

请问要咋么办呀


        }