Q:

C# program to read all lines of a text file

mahmoud2506
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2022-05-09
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Give a text file and we have to read it’s all lines using C# program.

File.ReadAllLines()

This is a method of "File class, which returns all lines (array of strings) from a text file.

Syntax:

String[] ReadAllLines(string filename);

Parameter(s):

  1. filename - name of the file.

Return value:

  1. This method return array of string, in which every element of array contains a line.
  2.  
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mahmoud2506
2022-05-09
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Program

using System;

using System.IO;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main()
        {
            int i = 0;
            string[] line;

            line = File.ReadAllLines("ABC.TXT");

            for (i = 0; i < line.Length; i++)
            {
                Console.WriteLine(line[i]);
            }
            
        }
    }
}

Output

This is Line 1.
This is Line 2.
This is Line 3.
This is Line 4.
This is Line 5.

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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