Okienka z plikami

Form1.cs

/**
* Bez openFileDialog
*/

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

namespace WindowsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void zapisz_Click(object sender, EventArgs e)
        {
            StreamWriter writer = new StreamWriter("plik.txt");
            writer.Write(richTextBox1.Text);
            writer.Flush();
            writer.Close();
        }

        private void otworz_Click(object sender, EventArgs e)
        {
            StreamReader reader = new StreamReader("plik.txt");
            richTextBox1.Text = reader.ReadToEnd();
            reader.Close();
        }
    }
}

Form2.cs

/**
* Z openFileDialog
*/

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

namespace WindowsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void zapisz_Click(object sender, EventArgs e)
        {
            saveFileDialog1.Filter = "Wszystkie pliki|*.*";
            saveFileDialog1.FileName = "plik.txt";
            if (saveFileDialog1.ShowDialog() == DialogResult.OK)
            {
                StreamWriter writer = new StreamWriter(saveFileDialog1.FileName);
                writer.Write(richTextBox1.Text);
                writer.Close();

            }
        }

        private void otworz_Click(object sender, EventArgs e)
        {
            openFileDialog1.Filter = "Wszystkie pliki|*.*";
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                StreamReader reader = new StreamReader(openFileDialog1.FileName);
                richTextBox1.Text = reader.ReadToEnd();
                reader.Close();
            }
        }
    }
}