此方法是验证业务对象的最佳方法吗?

我编写了这段代码来验证我的业务规则，我想知道这是否是验证业务对象的最佳解决方案。这样我就可以学会像这样对所有项目进行验证。此解决方案在软件设计的最佳实践方面可能存在许多严重问题。

public interface IRule
{
    bool Isvalid();
}
public class CategoryRule : IRule
{
    CategoryRepository _category;
    string _id, _name, _parent;
    public CategoryRule(string id, string name, string parent)
    {
        _id = id;
        _name = name;
        _parent = parent;
    }
    public object IsValid()
    {
        bool result = this.ValidateId();
        if (result)
            result = this.ValidateName();
        else
        {
            this.Message = "the id value is not correct.";
            return false;
        }
        if (result)
            result = this.ValidateParent();
        else
        {
            this.Message = "the name value is not correct.";
            return false;
        }
        if (result)
            return _category;
        else
        {
            this.Message = "the parent value is not correct.";
            return false;
        }
    }
    private bool ValidateId()
    {
        long id;
        if (long.TryParse(_id, out id))
            return true;
        _category.Id = id;
        return false;
    }
    private bool ValidateName()
    {
        if (!string.IsNullOrWhiteSpace(_name))
            return true;
        _category.Name = _name;
        return false;
    }
    private bool ValidateParent()
    {
        long parent;
        if (long.TryParse(_parent, out parent))
            return true;
        _category.Parent = parent;
        return false;
    }
    public string Message
    {
        get;
        private set;
    }
}
public class CategoryPresenter
{
    View _view;
    CategoryRepository _model;
    public void AddCategory()
    {
        CategoryRule rule = new CategoryRule(_view.Id, _view.Name, _view.Parent);
        object obj = rule.IsValid();
        if (obj.GetType() == typeof(bool))
            _view.ShowError(rule.Message);
        _model.Add(obj as CategoryRepository);
    }
}

我将不胜感激任何关于如何编写此代码的建议。