using System;

using FluentValidation;

​

public class Person

{

    public DateTime DateOfBirth { get; set; }   

    public String Name { get; set; }

}   

​

public class PersonValidator: AbstractValidator<Person>

{

    public PersonValidator()

    {

        RuleFor(p => p.Name).NotNull().Length(10, 200);

    }   

}

​

public class Program

{

    public static void Main()

    {

        ValidatorOptions.CascadeMode = CascadeMode.StopOnFirstFailure;

        Console.WriteLine("ValidationMode is {0}", ValidatorOptions.CascadeMode);

        var person = new Person();

        var validator = new PersonValidator();

        var result = validator.Validate(person);

        Console.WriteLine("Error count is {0}", result.Errors.Count);

    }

}