2021.3/CS10/Namespaces/FileScoped/FileScopedNamespace.cs (41 lines of code) (raw):

 #pragma warning disable 8509 #pragma warning disable 8618 #pragma warning disable 8524 // ReSharper disable UnusedMember.Global // ReSharper disable UnusedMember.Local // ReSharper disable UnusedType.Global namespace CS10.Namespaces.FileScoped { //Alt+Enter on greyed out "{" above, To file-scoped namespace public class Employees { private readonly List<Person> _supportEngineers; private readonly List<Person> _softwareEngineers; public Employees(List<Person> supportEngineers, List<Person> softwareEngineers) { _supportEngineers = supportEngineers; _softwareEngineers = softwareEngineers; } public IEnumerable<Person> AllEmployees { get { var employees = new List<Person>(); employees.AddRange(_supportEngineers); employees.AddRange(_softwareEngineers); return employees; } } public void AddEmployee(Person person, Role role) { var targetList = role switch { Role.SupportEngineer => _supportEngineers, Role.SoftwareEngineer => _softwareEngineers, }; targetList.Add(person); } } public enum Role { SupportEngineer, SoftwareEngineer } }