使用Cast方法进行数据类型转换

ArrayList arrList = new ArrayList();
for (int i = 0; i < 100; i++)
{
arrList.Add(i.ToString());
}
//使用Cast方法进行数据类型转换
var query = from item in arrList.Cast<string>()
                  select item;

Response.Write("包含9的数值是：");
foreach (var item in query)
{
Response.Write(item + " , ");
}

转载于:https://www.cnblogs.com/Yellowshorts/archive/2013/01/18/2866585.html