如何使用属性来影响C#中的函数？

public class User
{
    private string _name;

    // 自动实现的属性
    public string Name
    {
        get => _name;
        set
        {
            if (string.IsNullOrEmpty(value))
                throw new ArgumentException("Name cannot be null or empty.");
            _name = value;
        }
    }

    // 一个受属性影响的函数
    public void Greet()
    {
        if (Name == null)
        {
            Console.WriteLine("Hello, anonymous user!");
        }
        else
        {
            Console.WriteLine($"Hello, {Name}!");
        }
    }
}

class Program
{
    static void Main()
    {
        User user = new User();
        try
        {
            user.Name = ""; // 这将抛出异常
        }
        catch (ArgumentException ex)
        {
            Console.WriteLine(ex.Message);
        }

        user.Name = "Alice";
        user.Greet(); // 输出: Hello, Alice!
    }
}