static void Main(string[] args)
{
var model = new CustomModel();
model.Text = "abcdefghijklmnopqrstuvwxyz";
model.Text2 = "1";
model.Number = -5;
var validator = new DataAnnotationsValidator();
var results = new List <ValidationResult>();
//var context = new ValidationContext(model, serviceProvider: null, items: null);
//var isValid = Validator.TryValidateObject(model, context, results, true);
var isValid = validator.TryValidate(model, out results);
var errors = model.Validate(null);
if (!isValid)
{
foreach (var r in results)
{
Console.WriteLine($"member: {r.MemberNames.ToList()[0]} error: {r.ErrorMessage}");
}
}
Console.ReadKey();
}