public async void AddType(TypeC nitem)
 {
     await InitLocalStoreAsync();
     await Table.InsertAsync(nitem);
     await SyncAsync();
     await RefreshItems();
 }
 public async void DeleteType(TypeC nitem)
 {
     await InitLocalStoreAsync();
     await Table.DeleteAsync(nitem);
     await SyncAsync();
     await RefreshItems();
 }
 public async void AdjustType(TypeC nitem)
 {
     await InitLocalStoreAsync();
     await Table.UpdateAsync(nitem);
     await SyncAsync();
     await RefreshItems();
 }