Can't access public const?

Question

I have a class Port representing port's number with min and max value limits.

public class Port
{
    public const int MinPortNumber = 1025;
    public const int MaxPortNumber = ushort.MaxValue;

    private readonly int _portNumber;

    private Port(int portNumber)
    {
        _portNumber = portNumber;
    }

    public static implicit operator int(Port port) => port._portNumber;
    public override string ToString() => $"{_portNumber}";

    public static Port FromNumber(int portNumber)
    {
        Validate(portNumber);
        return new Port(portNumber);
    }
    
    private static void Validate(int port)
    {
        if (port is < MinPortNumber or > MaxPortNumber)
            throw PortRangeException.NotInRange(port, MinPortNumber, MaxPortNumber);
    }
}

I was trying to access it's value from another project, but on build I receive compilation error [CS1061]:

public class ServiceViewModel
{
    public ServiceViewModel()
    {
        _port = Port.MinPortNumber;
    }

    [ObservableProperty]
    private int _port;
}

I accessed this const in same project like

if ((int)(service.Port) is < Port.MinPortNumber or > Port.MaxPortNumber) {}

and it has worked.

So, why doesn't compiler allow me to access this const in that case?

Answer 1

It was my mistake.

Private field [ObservableProperty] private int _port; generates Port property, so it hides Port class behind it.

Solution was to rename this field and regenerate property.

[ObservableProperty] private int _portNumber = Port.MinPortNumber;