DirectoryInfo.Delete vs Directory.Delete

问题

I want to delete the contents of some temp files so I am working on small program that deletes them for me. I have these two code samples but I'm confused as to:

Which code sample is better?
The first sample, code1, deletes the files 1 and 2 but the second sample, code2 will delete the contains of folder 1 and 2?

code1

    public void DeleteContains(string Pathz)
    {
        List<DirectoryInfo> FolderToClear = new List<DirectoryInfo>();
        FolderToClear.Add(new DirectoryInfo(@"C:\Users\user\Desktop\1"));
        FolderToClear.Add(new DirectoryInfo(@"C:\Users\user\Desktop\2"));

        foreach (DirectoryInfo x in FolderToClear)
        {
            x.Delete(true);
        }
    }

code 2

    private void DeleteContents(string Path)
    {
        string[] DirectoryList = Directory.GetDirectories(Path);
        string[] FileList = Directory.GetFiles(Path);

        foreach (string file in FileList)
        {
            File.Delete(file);
        }
        foreach ( string directoryin DirectoryList)
        {
            Directory.Delete(directory, true);
        }
    }

回答1:

EDIT: I believe the OP wants a comparison of DirectoryInfo.Delete and Directory.Delete.

If you look at the decompiled source for each method (I used resharper to show me), you can see that DirectoryInfo.Delete and Directory.Delete both call the Delete method with 4 arguments. IMHO, the only difference is that Directory.Delete has to call Path.GetFullPathInternal to get the fullpath. Path.GetFullPathInternal is actually a very long method with lots of checks. Without doing a series of tests for performance, it would be unlikely to determine which is faster and by how much.

Directory.Delete

    [ResourceExposure(ResourceScope.Machine)]
    [ResourceConsumption(ResourceScope.Machine)]
    public static void Delete(String path, bool recursive)
    { 
        String fullPath = Path.GetFullPathInternal(path);
        Delete(fullPath, path, recursive, true); 
    }

DirectoryInfo.Delete

    [ResourceExposure(ResourceScope.None)] 
    [ResourceConsumption(ResourceScope.Machine, ResourceScope.Machine)]
    public void Delete(bool recursive) 
    {
        Directory.Delete(FullPath, OriginalPath, recursive, true);
    }

回答2:

The first code sample will only delete the folders "C:\Users\user\Desktop\1" and "C:\Users\user\Desktop\2" regardless of what is passed in the parameter.

The second code sample will delete all files and folders that are inside the directory specified by the parameter.

来源：https://stackoverflow.com/questions/13884781/directoryinfo-delete-vs-directory-delete

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