System.IO.IsolatedStorage.Helper.GetExistingRandomDirectory C# (CSharp) Méthode

        internal static string GetExistingRandomDirectory(string rootDirectory)
        {
            // Look for an existing random directory at the given root
            // (a set of nested directories that were created via Path.GetRandomFileName())

            // Older versions of the desktop framework created longer (24 character) random paths and would
            // migrate them if they could not find the new style directory.

            if (!Directory.Exists(rootDirectory))
                return null;

            foreach (string directory in Directory.GetDirectories(rootDirectory))
            {
                if (Path.GetFileName(directory)?.Length == 12)
                {
                    foreach (string subdirectory in Directory.GetDirectories(directory))
                    {
                        if (Path.GetFileName(subdirectory)?.Length == 12)
                        {
                            return subdirectory;
                        }
                    }
                }
            }

            return null;
        }

        public void GetExistingRandomDirectory()
        {
            using (var temp = new TempDirectory())
            {
                Assert.Null(Helper.GetExistingRandomDirectory(temp.Path));

                string randomPath = Path.Combine(temp.Path, Path.GetRandomFileName(), Path.GetRandomFileName());
                Directory.CreateDirectory(randomPath);
                Assert.Equal(randomPath, Helper.GetExistingRandomDirectory(temp.Path));
            }
        }