c# - 将字符串添加到列表 - 更快的方式？

Question

是否有比以下示例更快或更有效的方式将字符串添加到列表中？：

List<String> apptList = new List<String>();

foreach (Appointment appointment in appointments){

    String subject = appointment.Subject;
    //...(continues for another 10 lines)

    //...And then manually adding each String to the List:   
    apptList.Add(subject);
    //...(continues for another 10 lines)

    //And then send off List apptList to another method
}

Answer 1

var apptList = appointments.Select(a => a.Subject).ToList();

Answer 2

我不确定我的代码是否正确，但是由于您的 Appointment 类已经实现了 IEnumerable，因此您应该能够调用 ToList() 将其一次性转换为列表。

http://msdn.microsoft.com/en-us/library/bb342261.aspx

Answer 3

这个怎么样：

List<string> apptList = appointments.Select(x => x.Subject).ToList();