AppendAllText()

Instead of overwriting the already existing text, you can append the text at the end of the file. To do so, you can use the AppendAllText() method. Take a look at the following script:

using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace MyProgram

{

class Program

{

static void Main(string[] args)

{

Console.WriteLine("Enter the content you want to write to file:");

string text = Console.ReadLine();

File.AppendAllText("D:/myfile2.txt", text);

Console.ReadLine();

}

}

}

In the script above, the text entered by the user is appended at the end of the already existing text in “myfile2.txt”.