foreach (Category item in categories)
{
WriteLine(string.Format("ID={0}, Name={1}, Products in
category: {2}.", item.CategoryID, item.CategoryName,
item.Products.Length));
}
上述代码中item.Products.Length应为item.Products.Count
请发布新版本时更正一下:
foreach (Category item in categories)
{
WriteLine(string.Format ("ID={0}, Name={1}, Products in