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C# - Read all lines from a file using StreamReader class

Learn, how to read all lines from a file using StreamReader class in C#? By Nidhi Last updated : April 03, 2023

C# StreamReader Class Example

Here, we will read all lines from the file using the ReadLine() method of StringReader class and then print saved information on the console screen.

C# program to read all lines from a file using StreamReader class

The source code to read all lines from the file using StreamReader class is given below. The given program is compiled and executed successfully on Microsoft Visual Studio.

//C# program to read all lines from a file 
//using StreamReader class.

using System;
using System.IO;
using System.Text;

class Demo
{
    static void Main()
    {
        Stream stream = new FileStream(@"D:\data.txt", FileMode.Open);
        string line;
        StreamReader reader;

        reader = new StreamReader(stream, Encoding.UTF8);
            
        while (true)
        {
            line = reader.ReadLine();
            if (line == null)
                break;
            Console.WriteLine(line);
        }
    }
}

Output

This is a bag.
This is a bat.
This is a ball.
Press any key to continue . . .

Explanation

Here, we created a class Demo that contains the Main() method. The Main() method is the entry point of the program, here we read all lines of the "D:\data.txt" file using ReadLine() method of StringReader class and then print on the console screen.

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