C#: Create a file with text and read the file

Last update on December 20 2024 12:49:40 (UTC/GMT +8 hours)

Write a C# Sharp program to create a text file and read it.

Sample Solution:-

C# Sharp Code:

using System; // Importing the System namespace
using System.IO; // Importing the System.IO namespace for file operations
using System.Text; // Importing the System.Text namespace for encoding

class filexercise3 // Declaring a class named filexercise3
{
    public static void Main() // Declaring the Main method
    {
        string fileName = @"mytest.txt"; // Initializing a string variable with the file name

        try // Starting a try block to catch exceptions
        {
            // Delete the file if it exists.
            if (File.Exists(fileName)) // Checking if the file exists
            {
                File.Delete(fileName); // If the file exists, delete it
            }
			
            // Displaying a message to create a file with text and read the file
            Console.Write("\n\n Create a file with text and read the file  :\n");
            Console.Write("-------------------------------------------------\n");

            // Create the file and write content to it.
            using (StreamWriter fileStr = File.CreateText(fileName)) // Creating a StreamWriter to write text to the file
            {
                // Writing content to the file
                fileStr.WriteLine(" Hello and Welcome");
                fileStr.WriteLine(" It is the first content");
                fileStr.WriteLine(" of the text file mytest.txt");
            }	
            using (StreamReader sr = File.OpenText(fileName)) // Creating a StreamReader to read text from the file
            {
                string s = "";
                Console.WriteLine(" Here is the content of the file mytest.txt : ");

                // Reading and displaying content from the file
                while ((s = sr.ReadLine()) != null) // Reading lines until the end of the file
                {
                    Console.WriteLine(s); // Displaying each line in the console
                }
                Console.WriteLine(""); // Adding an empty line for better formatting
            }
        }
        catch (Exception MyExcep) // Catching any exceptions that might occur
        {
            Console.WriteLine(MyExcep.ToString()); // Displaying the exception details if any
        }
    }
}

Sample Output:

Create a file with text and read the file  :                                                                 
-------------------------------------------------                                                             
 Here is the content of the file mytest.txt :                                                                 
 Hello and Welcome                                                                                            
 It is the first content                                                                                      
 of the text file mytest.txt

Flowchart :

C# Sharp Code Editor:

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