c# 主窗体传值给子窗体

在Form1中     
      public static Form1 f=null;
      public Form1()
        {
            InitializeComponent();
            f = this;
       }

          public string  IP()
          {
              string ip;
              ip ="192.168.0.1";
              return ip;        
          }
          public int PORT()
          {
              int port;
              port =80 ;
              return port;
          }

      private void button1_Click(object sender, EventArgs e)
      {
            Form2 f2 = new Form2();
            f2.Show();     
           

}  

  Form2:

       private void Form2_Load(object sender, EventArgs e)
        {
            textBox1.Text = Form1.f.IP();
            textBox2.Text = Form1.f.PORT().ToString(); 
        }