次のコードで foreach を実行すると、この例外が発生します。
`System.InvalidCastException was unhandled by user code
Message=Specified cast is not valid.
Source=AWSSDK`
IEnumerable<FoodOutlet> foundOutletList = context.Scan<FoodOutlet>(
new ScanCondition("Postcode", ScanOperator.Equal, "3000")
);
List<FoodOutlet> foodOutletList = new List<FoodOutlet>();
foreach (FoodOutlet fo in foundOutletList)
{
foodOutletList.Add(fo);
}