C# Dictionary和HashTable中遍历Keys怎么写？

比如说建立了一个类Student包含字段name,age,hobby 用name作为Keys Dictionary<string, Student> stu = new Dictionary<string, Student>(); stu.Add(s1.Name,s1); stu.Add(s2.Name,s2); stu.Add(s3.Name,s3); 添加好了数据 遍历Value可以写 foreach (Student ss in stu.Values) { Student ass = (Student)ssss; MessageBox.Show(ass.Name.ToString()); } 那么遍历Keys都时候具体怎么写？ foreach (Student ss in stu.Keys) { }

参考答案：foreach (Student ss in stu.Values)
{
//Student ass = (Student)ssss;//这句话没用还是错误的
MessageBox.Show(ss.Name.ToString()); //ass改成ss
}
那么遍历Keys都时候具体怎么写？
//foreach (Student ss in stu.Keys)//这句话是错误的KEYS是string
foreach (string key in stu.Keys) //这样遍历
{
MessageBox.Show(key);
}

}