Returning multiple lists in C#

Question

I'm using a custom class to store information about files found in a directory based upon a regex, and I need to return these filelists from a method. Here's some psuedocode of how it's currently working:

class FileList {
//propertes of the file here, such as regex name, source folder and whether it needs to be deleted after copying
}

..
..

foreach (file in directory that matches regex)
{
    new filelist
    //Set all the properties
}

return allfilelists;

But how do I return the all the lists, or is there a better way of doing this?

Thanks

Answer 1

Why not return a list of FileLists?

var allfilelists = new List<FileList >();
foreach (file in directory that matches regex)
{
    new filelist
    //Set all the properties
    allfilelists.Add(fileList);
}

Answer 2

Any reason not to return a List<FileList> or something similar? (There's a choice of abstraction here - you could declare that the method returns IEnumerable<FileList> , IList<FileList> , List<FileList> etc.)

Answer 3

或者，您可以在该方法上返回IEnumerable<FileList> ，并使用yield关键字来使用延迟执行并消除List对象的开销（尽可能少）。

Answer 4

您可以使用List<FileList>或FileList[] 。