Code Smell: Primitive Obsession

public class Customer
{
    public string Name { get; private set; }
    public string Email { get; private set; }
 
    public Customer(string name, string email)
    {
        // Validate name
        if (string.IsNullOrWhiteSpace(name) || name.Length > 50)
            throw new ArgumentException("Name is invalid");
 
        // Validate e-mail
        if (string.IsNullOrWhiteSpace(email) || email.Length > 100)
            throw new ArgumentException("E-mail is invalid");
        if (!Regex.IsMatch(email, @"^([\w\.\-]+)@([\w\-]+)((\.(\w){2,3})+)$"))
            throw new ArgumentException("E-mail is invalid");
 
        Name = name;
        Email = email;
    }
 
    public void ChangeName(string name)
    {
        // Validate name
        if (string.IsNullOrWhiteSpace(name) || name.Length > 50)
            throw new ArgumentException("Name is invalid");
 
        Name = name;
    }
 
    public void ChangeEmail(string email)
    {
        // Validate e-mail
        if (string.IsNullOrWhiteSpace(email) || email.Length > 100)
            throw new ArgumentException("E-mail is invalid");
        if (!Regex.IsMatch(email, @"^([\w\.\-]+)@([\w\-]+)((\.(\w){2,3})+)$"))
            throw new ArgumentException("E-mail is invalid");
 
        Email = email;
    }
}