public static ExpressValidationRuleBuilder <T> Null <T>(this ExpressValidationBuilder <T> builder)
{
return
(builder
.True(CreateEqualNullExpression <T>())
.WithMessage($"{typeof(T).ToPrettyString()} must be null.")
.BreakOnFailure());
}
public static ExpressValidationRuleBuilder <T> False <T>(this ExpressValidationBuilder <T> builder, Expression <Func <T, bool> > expression)
{
return(builder.True(Negate(expression)));
}