Open Notepad++ - Click on File / New - Save as HelloWorld.cs Enter Code: // a class is a blueprint/container for data and instructions class HelloWorld { // a method - EVERY program needs a static method called 'Main' static void Main() { // Output text to the screen - use the System class System.Console.WriteLine("Hello World!"); } } Open the Visual Studio Command Window in the SAME FOLDER as the code - csc HelloWorld.cs - compiles the code - HelloWorld.exe - executes the code If there are SYNTAX ERRORS, you must edit the file again & the re-compile Check for RUNTIME ERRORS Check for LOGIC ERRORS