问foreach循环中的异步调用

EN

private async Task ProcessItems(List<Item> items)
{
    var modifiedItems = new List<modifiedItem>();

    foreach (var item in items)
    {
        // **edited to reflect link between items and properties**
        // var properties = await _context.Properties
        //   .Where(p => p.Condition == true).ToListAsync();
        var properties = await _context.Properties
          .Where(p => p.Condition == item.Condition).ToListAsync();

        foreach (var property in properties)
        {
            // do something to modify 'item'
            // based on the value of 'property'
            // save to variable 'modifiedItem'

            modifiedItems.Add(modifiedItem)
        }
    }

    await _context.ModifiedItems.AddRangeAsync(modifiedItems);
    await _context.SaveChangesAsync();
}