static public List<int> usedRandomNumbers = new List<int>();
        static Random random = new Random(DateTime.Now.Millisecond);

        public string GetRandomFileFromGivenFolderPath()
        {
            if (FolderPath_RandomFiles.Text != " ")
            {
                // Get an array of all file paths in the specified folder
                string[] files = Directory.GetFiles(FolderPath_RandomFiles.Text);

                // If no files are found, return null
                if (files.Length == 0)
                {
                    UpdateRichTextBox("No Files found!");
                    return "null";
                }

                // Generate a random number between 0 and the number of files minus 1
                int randomIndex = -1;
                do
                {
                    randomIndex = random.Next(0, files.Length);
                } while (usedRandomNumbers.Contains(randomIndex));

                usedRandomNumbers.Add(randomIndex);

                // Return the file path at the random index
                return files[randomIndex];
            }
            else
            {
                UpdateRichTextBox("Folder path for \"random Files Path\" not found!");
                return "null";
            }
        }

static public List<int> usedRandomNumbers = new List<int>();
        static Random random = new Random(DateTime.Now.Millisecond);

        public string GetRandomFileFromGivenFolderPath()
        {
            if (FolderPath_RandomFiles.Text != " ")
            {
                // Get an array of all file paths in the specified folder
                string[] files = Directory.GetFiles(FolderPath_RandomFiles.Text);

                // If no files are found, return null
                if (files.Length == 0)
                {
                    UpdateRichTextBox("No Files found!");
                    return "null";
                }

                // Generate a random number between 0 and the number of files minus 1
                int randomIndex = -1;
                do
                {
                    randomIndex = random.Next(0, files.Length);
                } while (usedRandomNumbers.Contains(randomIndex));

                usedRandomNumbers.Add(randomIndex);

                // Return the file path at the random index
                return files[randomIndex];
            }
            else
            {
                UpdateRichTextBox("Folder path for \"random Files Path\" not found!");
                return "null";
            }
        }