Hello, World in C#

Every C# console program writes output with Console.WriteLine. Modern projects often use top-level statements—no explicit Main method required—while the CLR still finds an entry point behind the scenes.

Minimal program

Console.WriteLine("Hello, World");

Console lives in the System namespace (imported by default in SDK-style projects). WriteLine appends a newline; use Write when you do not want one.

Classic Main form

class Program {
    static void Main() {
        Console.WriteLine("Hello, World");
    }
}

Both styles compile to the same IL. The playground accepts top-level statements for shorter lessons—similar ergonomics to scripting in Python but still compiled.

Important interview questions and answers

1. Q: What prints text in C#?
   A: Console.WriteLine for stdout in console apps; web apps use different APIs in the ASP.NET track.
2. Q: Top-level statements vs Main?
   A: Top-level code is lowered to a generated Main by the compiler—one entry point per project.

Self-check

1. Which class provides WriteLine?
2. What runtime executes compiled C#?

Tip: Top-level statements compile to a generated Main—use them in the playground; classic static void Main() still works in larger projects.