Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Showing content from https://www.geeksforgeeks.org/c-sharp/console-setin-method-in-c-sharp/ below:

Console.SetIn() Method in C# - GeeksforGeeks

Last Updated : 11 Jul, 2025

The

is used to set the

property of the specified StreamReader object i.e. it redirects the standard input from the console to the input file. Since the console is set with this StreamReader object, the

can be called to read the contents of the file, line by line.

Syntax: public static void SetIn (System.IO.StreamReader newIn); Parameter: newIn: It is a stream which is the new standard input.

• ArgumentNullException: If the newIn is null.
• SecurityException: If the caller does not have the required permission.

In this example, the SetIn() method is used to set the StreamReader object to the console, and the file's content will be read, stored and printed.

// C# program to demonstrate SetIn() method
using System;
using System.IO;

class GFG {

    // Main Method
    static void Main()
    {

        // Create a string to get 
        // data from the file
        string geeks = " ";

        // creating the StreamReader object
        // and set it to the desired 
        // text file
        using(StreamReader gfg = new StreamReader("D:\\out.txt"))
        {

            // setting the StreamReader 
            // object to the Console
            Console.SetIn(gfg);

            string l;

            // Reading the contents of the file into l
            while ((l = Console.ReadLine()) != null) 
            {
                geeks = geeks + l;
            }

            // Printing the file contents
            // appended to "Hello "
            Console.WriteLine("Hello " + geeks);

            // Waiting for user input
            // to exit the program
            Console.ReadKey();
        }
    }
}

• https://learn.microsoft.com/en-us/dotnet/api/system.console.setin?view=netframework-4.7.2#System_Console_SetIn_System_IO_TextReader_

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.4