dotnet6.10.cs

List<Status> statuses = new()
{    
  new(Category.Normal, new(20, false, 20)),    
  new(Category.Warning, new(20, false, 60)),    
  new(Category.Danger, new(20, true, 60)),    
  new(Category.Danger, new(100, false, 20))
};
foreach (Status status in statuses)
{    
  string message = status switch
  {
    {Category: Category.Normal} => "Let the good times roll",
    {Category: Category.Warning, Reading.PM25: >50 and <100} =>
    "Check the air filters",
    {Reading.PM25: >200 } => "There must be a fire somewhere.
    Don't go outside.",
    {Reading.SmokeDetected: true } => "We have a fire!",
    {Category: Category.Danger} => "Something is badly wrong",
    _ => "Unknown status"   
  };
Console.WriteLine(message);
}
record struct Reading(int Temperature, bool SmokeDetected, int PM25);
record struct Status(Category Category, Reading Reading);
enum Category
{    
  Normal,
  Warning,
  Danger
}