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C# program to write multiple (all) lines into a text file

In this C# program, we are going learn how to write all lines into a text file? To write, we are using WriteAllLines() method of File class.
Submitted by IncludeHelp, on November 08, 2017

Given multiple lines and we have to write all lines into a text file.


This is a method of "File class, which is used to write all lines in a text file.


void WriteAllLines(string filename);


  1. filename - name of the file.


using System;
using System.IO;

namespace ConsoleApplication1
    class Program
        static void Main()
            string[] line={
                            "Sample Line 1",
                            "Sample Line 2",
                            "Sample Line 3",
                            "Sample Line 4",
                            "Sample Line 5"

            File.WriteAllLines("sample.txt", line);

            Console.WriteLine("Data written successfully");


Data written successfully

Note: In above program, we need to remember, when we use "File" class, System.IO namespace must be included in the program.

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