Hei all, I am new to this Server and I realy need help on specific Problem [Answered]

else //Move file from a folder to another
                {
                    sr.Close();

                    { //Move File to destination
                        string moveFrom = fileToMove; //source path
                        string moveTo = destinationPath_Failed + Filename; //destination

                        // Ensure that the target does not exist.
                        if (File.Exists(moveTo))
                            File.Delete(moveTo);

                        //moving file
                        File.Move(moveFrom, moveTo); //something went wrong here. I dont know why. The programm is not copying the file originaly
                    }

else //Move file from a folder to another
                {
                    sr.Close();

                    { //Move File to destination
                        string moveFrom = fileToMove; //source path
                        string moveTo = destinationPath_Failed + Filename; //destination

                        // Ensure that the target does not exist.
                        if (File.Exists(moveTo))
                            File.Delete(moveTo);

                        //moving file
                        File.Move(moveFrom, moveTo); //something went wrong here. I dont know why. The programm is not copying the file originaly
                    }

string strResult = sr.ReadToEnd(); //save file innerbody to a string
                string[] result = strResult.Split(new string[] { Environment.NewLine }, StringSplitOptions.None); //split String in lines  und save every Line in an Array 

                int i = 0;
                List<string> converted = new(result);
                if (!converted[0].Contains("H;")) //remove all blanks a initial H
                {
                    for (int j = 0; j < result.Length; j++)
                    {
                        if (result[j].Contains("H;"))
                        {
                            while (!converted[i].Contains("H;"))
                            {
                                converted.RemoveAt(i);
                            }
                            break;
                        }
                    }

                    result = converted.ToArray();
                }

                i = result.Length - 1;
                if (!result[i].Contains("T;")) //remove all blanks at initial T
                {
                    for (int j = 0; j < result.Length; j++)
                    {
                        if (result[j].Contains("T;"))
                        {
                            while (!result[i].Contains("T;"))
                            {
                                result = result.SkipLast(1).ToArray();
                                i = result.Length - 1;
                            }
                            break;
                        }
                    }
                }

                int data = Get_datensaetze_anzahl(result); //count Datas... all line that have the inital D
                  

string strResult = sr.ReadToEnd(); //save file innerbody to a string
                string[] result = strResult.Split(new string[] { Environment.NewLine }, StringSplitOptions.None); //split String in lines  und save every Line in an Array 

                int i = 0;
                List<string> converted = new(result);
                if (!converted[0].Contains("H;")) //remove all blanks a initial H
                {
                    for (int j = 0; j < result.Length; j++)
                    {
                        if (result[j].Contains("H;"))
                        {
                            while (!converted[i].Contains("H;"))
                            {
                                converted.RemoveAt(i);
                            }
                            break;
                        }
                    }

                    result = converted.ToArray();
                }

                i = result.Length - 1;
                if (!result[i].Contains("T;")) //remove all blanks at initial T
                {
                    for (int j = 0; j < result.Length; j++)
                    {
                        if (result[j].Contains("T;"))
                        {
                            while (!result[i].Contains("T;"))
                            {
                                result = result.SkipLast(1).ToArray();
                                i = result.Length - 1;
                            }
                            break;
                        }
                    }
                }

                int data = Get_datensaetze_anzahl(result); //count Datas... all line that have the inital D
                  

 var files = from file in Directory.EnumerateFiles(rootFolderPath, "*.csv") select file;

 var files = from file in Directory.EnumerateFiles(rootFolderPath, "*.csv") select file;

 string[] files = System.IO.Directory.GetFiles(rootFolderPath, "*.csv");

 string[] files = System.IO.Directory.GetFiles(rootFolderPath, "*.csv");