database

db is 2 types
1.file management system
2.db management system

FILE MANAGEMENT SYSTEM
 private void button1_Click(object sender, EventArgs e)
        {
            OpenFileDialog obj1 = new OpenFileDialog();
            obj1.ShowDialog();
           
           txtopenfile.Text = obj1.FileName;
            private void write_btn_Click(object sender, EventArgs e)
        {
            FileStream fs = new FileStream(txtopenfile.Text,FileMode.Open,FileAccess.Write);
            StreamWriter sw = new StreamWriter(fs);
            sw.WriteLine(txtwrit.Text);
            sw.Close();
            fs.Close();
        }

        private void button1_Click_1(object sender, EventArgs e)
        {
            FileStream fs = new FileStream(txtopenfile.Text,FileMode.Open,FileAccess.Read);
            StreamReader sr = new StreamReader(fs);
            textBox1.Text = sr.ReadToEnd();
            sr.Close();
            fs.Close();

        }
    }
}