//使用Dapper查询返回Dictionary
static void QueryDictionary()
{
Dictionary <int, int> keyValuePairs = PersonDB.QueryReturnDictionary();
Array.ForEach(keyValuePairs.ToArray(), n => Console.WriteLine($"Id:{n.Key},Age:{n.Value}"));
//keyValuePairs.ToArray()的结果是KeyValuePair<int,int>[]
//Dictionary可以看作是KeyValuePair类型的集合
}
