public void FetchData(Action<Exception> onError)
{
IsLoading = true;
var service = new AccountService(new ApiConfiguration(), null, _keyService);
var cService = new CustomerService(new ApiConfiguration(), null, _keyService);
var iService = new ServiceInvoiceService(new ApiConfiguration(), null, _keyService);
Task.WhenAll(new[]
{
service.GetRangeAsync(CompanyFile.CompanyFile, null, CompanyFile.Authentication[0])
.ContinueWith(t => DisplayAccounts(t.Result.Items), TaskScheduler.FromCurrentSynchronizationContext()),
cService.GetRangeAsync(CompanyFile.CompanyFile, null, CompanyFile.Authentication[0])
.ContinueWith(t => DisplayCustomers(t.Result.Items), TaskScheduler.FromCurrentSynchronizationContext()),
iService.GetRangeAsync(CompanyFile.CompanyFile, null, CompanyFile.Authentication[0])
.ContinueWith(t => DisplayInvoices(t.Result.Items), TaskScheduler.FromCurrentSynchronizationContext())
})
.ContinueWith(t =>
{
IsLoading = false;
}, TaskScheduler.FromCurrentSynchronizationContext());
}
