Model not being fully validated

Question

Good morning Guys, I’m testing an application to add a client, but whenever I try to add the user, test the Viewmodel to see if the information is consistent, but the program does not validate all Viewmodel ignoring the end of it, would know why this is happening ?

Addclientviewmodels:

public class TelefoneVM
{
    public String Telephone { get; set; }
}

public class EmailVM
{
    public String Email { get; set; }
}

public class AddClientViewModels : IValidatableObject
{
    [Key]
    public Guid Id { get; set; }

    [Required]
    [Display(Name = "Tipo Pessoa")]
    public int TypePerson { get; set; }

    [StringLength(100, ErrorMessage = "O {0} deve ter pelo menos {2} e no máximo {1} caracteres.", MinimumLength = 3)]
    [Display(Name = "Nome")]
    public String Name { get; set; }

    [StringLength(100, ErrorMessage = "A {0} deve ter pelo menos {2} e no máximo {1} caracteres.", MinimumLength = 3)]
    [Display(Name = "Razão Social")]
    public String CompanyName { get; set; }

    [RegularExpression(@"^\([1-9]{2}\) [2-9][0-9]{3,4}\-[0-9]{4}$", ErrorMessage = "Telefone está em um formato inválido.")]
    [Display(Name = "Telefone")]
    public List<TelefoneVM> Telephones { get; set; }

    [RegularExpression(@"^(([A-Za-z0-9]+_+)|([A-Za-z0-9]+\-+)|([A-Za-z0-9]+\.+)|([A-Za-z0-9]+\++))*[A-Za-z0-9]+@((\w+\-+)|(\w+\.))*\w{1,63}\.[a-zA-Z]{2,6}$", ErrorMessage = "E-mail está em um formato inválido.")]
    [Display(Name = "E-mail")]
    public List<EmailVM> Emails { get; set; }


    public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
    {
        if (TypePerson == 1 && String.IsNullOrEmpty(Name)) 
            yield return new ValidationResult("Nome é obrigatório", new[] { nameof(Name) });

        if (TypePerson == 2 && String.IsNullOrEmpty(CompanyName))
            yield return new ValidationResult("Razão Social é obrigatório", new[] { nameof(CompanyName) });
    }
}

That last part, he just ignores:

public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
    {
        if (TypePerson == 1 && String.IsNullOrEmpty(Name)) 
            yield return new ValidationResult("Nome é obrigatório", new[] { nameof(Name) });

        if (TypePerson == 2 && String.IsNullOrEmpty(CompanyName))
            yield return new ValidationResult("Razão Social é obrigatório", new[] { nameof(CompanyName) });
    }

This way I can not validate if the user is physical or legal, and I can not return the mandatory field error, I really appreciate if you can help me.