import java.text.Collator;
import java.text.RuleBasedCollator;
 
        String rule = ((RuleBasedCollator)Collator.getInstance(Locale.US)).getRules();
        //修改rule
        //修改完成
        Collator collator = new RuleBasedCollator(rule);
        collator.setStrength(Collator.PRIMARY);上面这段代码如何改成c#的?