DbExpressions.MySqlQueryTranslator.VisitUnaryExpression C# (CSharp) Method

        protected override DbExpression VisitUnaryExpression(DbUnaryExpression unaryExpression)
        {
            string syntax;

            switch (unaryExpression.UnaryExpressionType)
            {
                case DbUnaryExpressionType.Not:
                    syntax = string.Format("NOT {0}", Visit(unaryExpression.Operand));
                    break;
                case DbUnaryExpressionType.Cast:
                    syntax = string.Format("CAST({0} AS {1})",
                                           Visit(unaryExpression.Operand),
                                           GetCastFunctionBody(unaryExpression.TargetType));
                    break;
                default:
                    throw new ArgumentOutOfRangeException("unaryExpression",
                                                          string.Format(
                                                              "The UnaryExpressionType '{0}' is not supported",
                                                              unaryExpression.UnaryExpressionType));
            }

            return ExpressionFactory.Sql(syntax);
        }