      private void button1_Click(object sender, EventArgs e)
        {
            output = new FileStream("Student.Rnd", FileMode.Create, FileAccess.Write);
            binaryOutput = new BinaryWriter(output);
            for (int i = 0; i < NUMBER_OF_REC; i++)
            {
                output.Position = i * randomAccessRecord.SIZE;
                binaryOutput.Write(record.StNo);
                binaryOutput.Write(record.fName);
                binaryOutput.Write(record.lName);
                binaryOutput.Write(record.Grade);

            }
            output.Close();
            MessageBox.Show("Random Access File Created");
        }
