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 ArrayF[Stelle].Beschreibung:=Fr_MLoesung.Lines.                    

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uses
  ActiveX, ShlObj;


type
  TMyData = class
  strict private
    FMyDataExample: string;
  public
    constructor Create(const AMyDataExample: string = '');
    procedure LoadFromStream(AStream: TStream);
    procedure SaveToStream(AStream: TStream);
    property MyDataExample: string read FMyDataExample write FMyDataExample;
  end;

  TMyDataList = class(TObjectList<TMyData>)
  public
    constructor Create;
    procedure LoadFromStream(AStream: TStream);
    procedure SaveToStream(AStream: TStream);
    procedure LoadFromFile(const AFileName: string);
    procedure SaveToFile(const AFileName: string);
  end;

// ...

// aus: http://www.delphi-library.de/viewtopic.php?t=9428
// Gibt den Pfad des übergebenen Ordners zurück.
function GetSpecialFolder(AFolder: Integer): string;
var
  pIdL: PItemIDList;
  Path: array[0..Max_Path] of Char;
  Allocator: IMalloc;
begin
  // ItemIdList für den Ordner holen
  SHGetSpecialFolderLocation(0, aFolder, pIdL);
  // ItemIdList in String umwandeln lassen
  SHGetPathFromIDList(pIDL, Path);
  // Speicher wieder freigeben
  if Succeeded(SHGetMalloc (Allocator)) then
    Allocator.Free (pIdL);
  Result := Path;
end;

function LoadStringFromStream(AStream: TStream): String;
var
  ResultString: AnsiString;
  StringSize: Integer;
begin
  Result := '';
  if AStream.Size - AStream.Position < SizeOf(StringSize) then
    Exit;
  AStream.ReadBuffer(StringSize, SizeOf(StringSize));
  SetLength(ResultString, StringSize);
  if AStream.Size - AStream.Position < StringSize then
    Exit;
  AStream.ReadBuffer(Pointer(ResultString)^, StringSize);
  {$ifdef UNICODE} // ab Delphi 2009
  Result := Utf8ToString(ResultString);
  {$else}
  Result := Utf8Decode(ResultString);
  {$endif}
end;

procedure SaveStringToStream(AStream: TStream; AString: String);
var
  StringSize: Integer;
  StringToSave: AnsiString;
begin
  StringToSave := Utf8Encode(AString);
  StringSize := Length(StringToSave);
  AStream.WriteBuffer(StringSize, SizeOf(StringSize));
  AStream.WriteBuffer(Pointer(StringToSave)^, StringSize);
end;

constructor TMyData.Create(const AMyDataExample: string);
begin
  FMyDataExample := AMyDataExample;
end;

procedure TMyData.LoadFromStream(AStream: TStream);
begin
  FMyDataExample := LoadStringFromStream(AStream);
end;

procedure TMyData.SaveToStream(AStream: TStream);
begin
  SaveStringToStream(AStream, FMyDataExample);
end;

constructor TMyDataList.Create;
begin
  inherited Create(True);
end;

procedure TMyDataList.LoadFromFile(const AFileName: string);
var
  FileContents: TFileStream;
begin
  FileContents := TFileStream.Create(AFileName, fmOpenRead);
  try
    LoadFromStream(FileContents);
  finally
    FileContents.Free;
  end;
end;

procedure TMyDataList.LoadFromStream(AStream: TStream);
var
  i, DataCount: LongInt;
  NewData: TMyData;
begin
  AStream.ReadBuffer(DataCount, SizeOf(DataCount));
  for i := 1 to DataCount do
  begin
    NewData := TMyData.Create;
    NewData.LoadFromStream(AStream);
    Add(NewData);
  end;
end;

procedure TMyDataList.SaveToFile(const AFileName: string);
var
  FileContents: TFileStream;
begin
  FileContents := TFileStream.Create(AFileName, fmCreate);
  try
    SaveToStream(FileContents);
  finally
    FileContents.Free;
  end;
end;

procedure TMyDataList.SaveToStream(AStream: TStream);
var
  i, DataCount: LongInt;
  CurrentData: TMyData;
begin
  DataCount := Count;
  AStream.WriteBuffer(DataCount, SizeOf(DataCount));
  for CurrentData in Self do
    CurrentData.SaveToStream(AStream);
end;

// Beispiel:
var
  MyDataList: TMyDataList;
  CurrentData: TMyData;
  DataFileName: string;
begin
  MyDataList := TMyDataList.Create;
  try
    // bestehende Daten laden
    DataFileName := IncludeTrailingPathDelimiter(GetSpecialFolder(CSIDL_LOCAL_APPDATA)) + 'Test.txt';
    if FileExists(DataFileName) then
      MyDataList.LoadFromFile(DataFileName);

    // alle ausgeben
    for CurrentData in MyDataList do
      ShowMessage(CurrentData.MyDataExample);

    // neue Einträge erzeugen
    MyDataList.Add(TMyData.Create('Ein kleiner Test'));
    MyDataList.Add(TMyData.Create('Noch ein Test'));
    MyDataList.Add(TMyData.Create('Das ist ein Satz!'));

    // alle ausgeben
    for CurrentData in MyDataList do
      ShowMessage(CurrentData.MyDataExample);

    // alle speichern
    MyDataList.SaveToFile(DataFileName);
  finally
    MyDataList.Free;
  end;
end;