private async void FillCombobox()
 {
     foreach (var item in await SimpleDataSource.GetTestData(4))
     {
         comboBoxEditCategory.Properties.Items.Add(item.Category);
     }
 }
        private async void InitializeBindings()
        {
            _bindingSource.DataSource = await SimpleDataSource.GetTestData();

            textEditName.DataBindings.Add(new Binding(nameof(textEditName.Text), _bindingSource, nameof(SimpleDataSource.SimpleData.Name)));
            comboBoxEditCategory.DataBindings.Add(new Binding(nameof(comboBoxEditCategory.EditValue), _bindingSource, nameof(SimpleDataSource.SimpleData.Category)));
        }