Question

The user should be able to save data to the customer details file. Write the code that Elina
should use to save data to the customer details file

Answer 1

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
namespace Question
{
    class Program
    {
        static void Main(string[] args)
        {
            string Data = "";
            Console.WriteLine("Please enter some data to write into a file:");
            Data = Console.ReadLine();//Getting any input information from console
            string pass = @"D:\"; //Pass to the file
            string fileName = "customerDetailsFile.txt"; //file Name
            FileStream fs; //object to write data
            if (!File.Exists(pass + fileName)) //File exist?
            {
                Console.Write(pass + fileName + " doesn't exist. We will create it.");
                fs = new FileStream(pass + fileName, FileMode.Create, FileAccess.Write);
                //Create file for writing
            }
            else fs = new FileStream(pass + fileName, FileMode.Open, FileAccess.Write); // Just
            open it
            Byte[] info = new UTF8Encoding(true).GetBytes(Data); //Convert your data to Bytes
            fs.Seek(0, SeekOrigin.End); //Seeking for the last point in the file
            fs.Write(info, 0, info.Length); // Writing data
            fs.Close();//Do not forget to close a file
        }
    }
}