System.Data.ZeroOpNode.Eval C# (CSharp) Метод

        internal override object Eval()
        {
            switch (_op)
            {
                case Operators.True:
                    return true;
                case Operators.False:
                    return false;
                case Operators.Null:
                    return DBNull.Value;
                default:
                    Debug.Assert(_op == Operators.True || _op == Operators.False || _op == Operators.Null, "Invalid zero-op");
                    return DBNull.Value;
            }
        }