public void SaveSettings(string category, string tags)
{
var cat = new QuickSetting { Author = author, SettingName = "category", SettingValue = category };
var tag = new QuickSetting { Author = author, SettingName = "tags", SettingValue = tags };
// save to collection
this.Settings.Save(cat);
this.Settings.Save(tag);
// save to storage
BlogService.SaveQuickSetting(cat);
BlogService.SaveQuickSetting(tag);
// reset cache
Blog.CurrentInstance.Cache.Remove(cacheKeySettings);
}