Xamarin Behavior for validating an element

ValidationBehavior.cs

using Xamarin.Forms;
using System.Collections.ObjectModel;
using XamarinFormValidation.Validators.Contracts;
using XamarinFormValidation.Validators.Implementations;
using System.ComponentModel;

namespace XamarinFormValidation.Behaviors
{
    public class ValidationBehavior : Behavior<View>
    {
        IErrorStyle _style = new BasicErrorStyle();
        View _view;
        public string PropertyName { get; set; }
        public ObservableCollection<IValidator> Validators { get; set; } = new ObservableCollection<IValidator>();
        ...
     }
}