NullChecks - Sample 5

Program.cs

static void Main(string[] args)
{
  DoSomething("Hello World!"); // Works perfectly 👌
  
  DoSomething(null); // Throws ArgumentNullException at runtime.
  
  string parameter = null;
  DoSomething(parameter); // Throws ArgumentNullException at runtime.
}

public static void DoSomething(NotNull<string> message) // <--- NotNull is used here
{
    Console.WriteLine(message.Value);
}