This redundant Readonly prefix

internal abstract class ReadonlyCoefs
{
    public const Boolean Allowed = true;
    public const Boolean Disallowed = false;

    public abstract Boolean GetCoef();
}

internal class Coefs : ReadonlyCoefs
{
    public override Boolean GetCoef()  { ... }
    public void SetCoef()  { ... }
}

Now, suppose i want to use it somewhere like this

if (variable == ReadonlyCoefs.Allowed)
    ...

I don't think i want to have Readonly prefix.

In this case i can just add instance methods IsAllowed and SetAllowed, SetDisallowed, but if there are a lot of consts, how to be in such a case?