ScreenToGif.Pages.Processing.Dispose C# (CSharp) Method

        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        /// <summary>
        /// Thread method that encodes the list of frames.
        /// </summary>
        private void DoWork()
        {
            int countList  = _listBitmap.Count;
            var processing = new Processing();

            this.Invoke((Action) delegate //Needed because it's a cross thread call.
            {
                //Control ctrlParent = panelTransparent;

                //Processing processing = new Processing();
                panelTransparent.Controls.Add(processing);
                processing.Dock = DockStyle.Fill;
                processing.SetMaximumValue(countList);
                processing.SetStatus(1);
            });

            if (Settings.Default.STencodingCustom) // if NGif encoding
            {
                #region Ngif encoding

                int numImage = 0;

                using (_encoder = new AnimatedGifEncoder())
                {
                    _encoder.Start(_outputpath);
                    _encoder.SetQuality(Settings.Default.STquality);

                    _encoder.SetRepeat(Settings.Default.STloop ? (Settings.Default.STrepeatForever ? 0 : Settings.Default.STrepeatCount) : -1); // 0 = Always, -1 once


                    try
                    {
                        foreach (var image in _listBitmap)
                        {
                            numImage++;

                            this.BeginInvoke((Action)(() => processing.SetStatus(numImage)));

                            _encoder.SetFrameRate(Convert.ToInt32(numMaxFps.Value));
                            _encoder.AddFrame(image);
                        }
                    }
                    catch (Exception ex)
                    {
                        LogWriter.Log(ex, "Ngif encoding.");
                    }
                }

                #endregion
            }
            else //if paint.NET encoding
            {
                #region paint.NET encoding

                //var imageArray = _listBitmap.ToArray();

                var delay  = 1000 / Convert.ToInt32(numMaxFps.Value);
                var repeat = (Settings.Default.STloop ? (Settings.Default.STrepeatForever ? 0 : Settings.Default.STrepeatCount) : -1); // 0 = Always, -1 once

                using (var stream = new MemoryStream())
                {
                    using (var encoderNet = new GifEncoder(stream, null, null, repeat))
                    {
                        for (int i = 0; i < _listBitmap.Count; i++)
                        {
                            encoderNet.AddFrame((_listBitmap[i]).CopyImage(), 0, 0, TimeSpan.FromMilliseconds(delay));

                            this.Invoke((Action)(() => processing.SetStatus(i)));
                        }
                    }

                    stream.Position = 0;

                    using (
                        var fileStream = new FileStream(_outputpath, FileMode.Create, FileAccess.Write, FileShare.None,
                                                        Constants.BufferSize, false))
                    {
                        stream.WriteTo(fileStream);
                    }
                }

                #endregion
            }

            #region Memory Clearing

            //TODO: Clean the list of delay.

            listFramesPrivate.Clear();
            listFramesUndo.Clear();
            listFramesUndoAll.Clear();

            listFramesPrivate = null;
            listFramesUndo    = null;
            listFramesUndoAll = null;
            _encoder          = null;

            GC.Collect(); //call the garbage colector to empty the memory

            #endregion

            #region Finish

            try
            {
                this.Invoke((Action) delegate //must use invoke because it's a cross thread call
                {
                    _caller.Text = Resources.Title_EncodingDone;
                    _stage       = (int)Stage.Stoped;

                    panelTransparent.Controls.Clear(); //Clears the processing page.
                    processing.Dispose();
                    _caller.Invalidate();

                    btnRecordPause.Text  = Resources.btnRecordPause_Record;
                    btnRecordPause.Image = Properties.Resources.Record;
                    flowPanel.Enabled    = true;
                    //_caller.TopMost = false;
                    _caller.TopMost = false;

                    numMaxFps.Enabled = true;
                    tbHeight.Enabled  = true;
                    tbWidth.Enabled   = true;

                    _caller.MaximizeBox = true;
                    _caller.MinimizeBox = true;

                    _actHook.KeyDown += KeyHookTarget; //Set again the keyboard hook method
                    _actHook.Start(false, true);       //start again the keyboard hook watcher
                });
            }
            catch (Exception ex)
            {
                LogWriter.Log(ex, "Invoke error.");
            }

            #endregion
        }