using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        string str = "Form1からラベルを書き換えました";

        public Form1()
        {
            InitializeComponent();
        }

        public string TextBoxText
        {
            get
            {
                return str;
            }
            set
            {
                str = value;
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            Form2 f = new Form2();
            Form2.Form2Instance = f;
            f.Show();
            Form2.Form2Instance.TextBoxText = this.str;
            
        }
    }
}