c# - FluentValidation Validate Method throwing an excepion -

i'm having issues using fluentvalidation library.

i have small model
`

[fluentvalidation.attributes.validator(typeof(personvalidator))]  public class personmodel {   public string name { get; set; }   public nullable<short> type { get; set; } } 

`

have validator class

public class personvalidator : abstractvalidator<personmodel> {        public personvalidator()     {          rulefor(x => x.name)         .length(1, 5)             .withlocalizedmessage(() => basevalidationresource.lengthvalidationmessage, 1, 5);       } } 

and have controller

public actionresult index()     {          var model = new personmodel();         model.name = "john doe";          var validator = new personvalidator();         var results = validator.validate(model);         var error = getmodelerrors();          return view(model);     } 

so far good, issue when progam executing , gets line ; var results = validator.validate(model); throws systemformatexception.

instead of throwing exception, shouldn't validate method return object containing boolean field indicates if model valid , list of errors.

ps : know particular validation can done using dataannotations want use fluentvalidation because more flexible.

thanks in advance help.

as @ric pointed out string formatting issue on resource file.

on validor had line

 rulefor(x => x.name)         .length(1, 5)             .withlocalizedmessage(() => basevalidationresource.lengthvalidationmessage, 1, 5); 

which pointed resource file , passed 2 parameters. on resource file expecting 3 parameters (property name, min value, max value).

however using wrong annotation. below before , after version of the resource file.