LINQ延迟求值和主动求值

在延迟求值的情况下，只是定义了一个查询，而且不是立刻执行。

List<int> list = new List<int>() { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
            var temp1 = from c in list where c > 5 select c;
            var temp2 = (from c in list where c > 5 select c).ToList<int>();
            Console.WriteLine(temp1.GetType());
            Console.WriteLine(temp2.GetType());
            list[0] = 11;
            Console.WriteLine("temp1: ");
            foreach (var item in temp1)
            {
                Console.WriteLine(item.ToString() + " ");
            }
            Console.WriteLine("\n temp2: ");
            foreach (var item in temp2)
            {
                Console.WriteLine(item.ToString() + " ");
            }
            Console.WriteLine("Hello World!");