How to delete all files and folders in a directory?

I used

Directory.GetFiles(picturePath).ToList().ForEach(File.Delete);

for delete the old picture and I don't need any object in this folder

Here is the tool I ended with after reading all posts. It does

• Deletes all that can be deleted
• Returns false if some files remain in folder

It deals with

• Readonly files
• Deletion delay
• Locked files

It doesn't use Directory.Delete because the process is aborted on exception.

    /// <summary>
    /// Attempt to empty the folder. Return false if it fails (locked files...).
    /// </summary>
    /// <param name="pathName"></param>
    /// <returns>true on success</returns>
    public static bool EmptyFolder(string pathName)
    {
        bool errors = false;
        DirectoryInfo dir = new DirectoryInfo(pathName);

        foreach (FileInfo fi in dir.EnumerateFiles())
        {
            try
            {
                fi.IsReadOnly = false;
                fi.Delete();

                //Wait for the item to disapear (avoid 'dir not empty' error).
                while (fi.Exists)
                {
                    System.Threading.Thread.Sleep(10);
                    fi.Refresh();
                }
            }
            catch (IOException e)
            {
                Debug.WriteLine(e.Message);
                errors = true;
            }
        }

        foreach (DirectoryInfo di in dir.EnumerateDirectories())
        {
            try
            {
                EmptyFolder(di.FullName);
                di.Delete();

                //Wait for the item to disapear (avoid 'dir not empty' error).
                while (di.Exists)
                {
                    System.Threading.Thread.Sleep(10);
                    di.Refresh();
                }
            }
            catch (IOException e)
            {
                Debug.WriteLine(e.Message);
                errors = true;
            }
        }

        return !errors;
    }

I know this is an ancient question but this is the (perhaps new) correct answer:

new DirectoryInfo(folder).Delete(true);
Directory.CreateDirectory(folder);

Deletes all recursive and then recreates the folder.

PS - Must have reference using System.IO;

DirectoryInfo.GetFileSystemInfos returns both files and directories :-

new DirectoryInfo(targetDir).GetFileSystemInfos().ToList().ForEach(x => x.Delete());

or if you want to recursive delete :-

        new DirectoryInfo(targetDir).GetFileSystemInfos().ToList().ForEach(x =>
        {
            if (x is DirectoryInfo di)
                di.Delete(true);
            else
                x.Delete();
        });