DataAnnotations：递归验证整个对象图

使用DataAnnotations实现递归验证整个对象图

csharp
public class Address
{
    [Required]
    public string Street { get; set; }
    [Required]
    public string City { get; set; }
}
public class Person
{
    [Required]
    public string Name { get; set; }
    [Required]
    public Address Address { get; set; }
}
public class Program
{
    static void Main(string[] args)
    {
        var address = new Address();
        var person = new Person { Name = "John", Address = address };
        var validationResults = new List();
        var context = new ValidationContext(person, null, null);
        Validator.TryValidateObject(person, context, validationResults, true);
        foreach (var result in validationResults)
        {
            Console.WriteLine(result.ErrorMessage);
        }
    }
}