private async void LoadUserSkills()
{
SkillManager skillManager = (SkillManager)dataService.GetSkillManager();
Dictionary <string, object> skillChargeParams = new Dictionary <string, object>();
skillChargeParams.Add("mail", AppStaticInfo.Account.Mail);
Skills = new ObservableCollection <Skill>((await skillManager.Charge(skillChargeParams)).Cast <Skill>().ToList());
}