C# Optional Extension

namespace MeyerExtensions.Types
{
  public sealed class Optional<T>
  {
    public bool IsNone { get; private set; } = false;

    public T Value { get; } = default;

    public Optional(T value)
    {
      this.Value = value;
      this.IsNone = value == null;
    }

    public static Optional<T> Some(T value) => new Optional<T>(value);
    public static Optional<T> None() => new Optional<T>(default(T)) { IsNone = true };
    public static implicit operator Optional<T>(T value) => Some(value);
  }
}