/// <summary>
/// 创建带范畴限定的选择器
/// </summary>
/// <param name="expression">选择器表达式</param>
/// <param name="scope">范畴限定，上溯时不超出此范畴</param>
/// <returns>带范畴限定的层叠选择器</returns>
public static ICssSelector Create(IHtmlContainer scope, string expression)
{
if (scope == null)
{
throw new ArgumentNullException("scope");
}
if (expression == null)
{
throw new ArgumentNullException("expression");
}
return(CssCasecadingSelector.Create(new CssAncetorRelativeSelector(new ContainerRestrict(scope)), CssParser.ParseSelector(expression)));
}