ValidationRulesTest.ExapleViewModel2.cs

using Plugin.ValidationRules;
using ValidationRulesTest.Validations;
using ValidationRulesTest.Models;

namespace ValidationRulesTest.ViewModels
{
    public class Example2ViewModel
    {
        public Example2ViewModel()
        {
            User = new User();            
            AddValidations();
        }

        public User User { get; set; }

        private void AddValidations()
        {
            // Name validations
            User.Name.Validations.Add(new IsNotNullOrEmptyRule<string> { ValidationMessage = "A name is required." });

            //Lastname validations
            User.LastName.Validations.Add(new IsNotNullOrEmptyRule<string> { ValidationMessage = "A lastname is required." });

            //Email validations
            User.Email.Validations.Add(new IsNotNullOrEmptyRule<string>{ ValidationMessage = "A email is required." });
            User.Email.Validations.Add(new EmailRule<string> { ValidationMessage = "Email is not valid." });
        }

    }
}