public async Task load()
{
TagDataService tagDataService = new TagDataService(new EntityFramework.TimetableManagerDbContext());
TagList = await tagDataService.GetTags();
TagList.ForEach(e =>
{
Tag l = new Tag();
l.TagId = e.TagId;
l.TagName = e.TagName;
TagDataList.Add(l);
});
}