File Handling Concept in C#

File handling concept in C#:-

The file is a collection of records, It is used to store information permanently under the client machine.

C# provides IO namespace to perform the file handling task.

Operation on File:-

1)  Write File:-

It is used to save the record on file

using System.IO;

class FileHandlingOperation
    {
        public static void Main()
        {
            File.WriteAllText("D://mydemo.txt", "Welcome in File Handling");
            Console.ReadKey();
        }
    }

2)  Read File

class FileHandlingOperation
    {
        public static void Main()
        {
           String s= File.ReadAllText("D://mydemo.txt");
           Console.WriteLine(s);
            Console.ReadKey();
        }
    }

3)  Append File Operation:-

    class FileHandlingOperation
    {
        public static void Main()
        {
            File.AppendAllText("D://mydemo.txt", "Welcome in File Handling");
            Console.ReadKey();
        }
    }