using System; using System.IO; class Program { static void Main() { string fileName = "test.txt"; using (TextWriter writer = File.CreateText(fileName)) { writer.WriteLine("Hello World!"); writer.Flush(); } } }
using System; using System.IO; class Program { static void Main() { Console.WriteLine("Please enter your name:"); string name = Console.ReadLine(); using (TextWriter writer = Console.Out) { writer.WriteLine("Hello " + name); writer.Flush(); } } }This code prompts the user to enter their name and then prints out a greeting to the console. The Flush() method is called to ensure that the greeting is immediately displayed to the user. The TextWriter.Flush() method belongs to the System.IO package library in C#.