Nanook.QueenBee.EditorForm.btnSavePak_Click C# (CSharp) Method

        private void btnSavePak_Click(object sender, EventArgs e)
        {
            try
            {
                this.Cursor = Cursors.WaitCursor;

                long pakLen = _pakFormat.CompressedPakFilesize;
                long pabLen = _pakFormat.CompressedPabFilesize;

                QbItemBase qib;
                try
                {
                    _qbFile.AlignPointers();
                    qib = _qbFile.IsValid();
                    if (qib != null)
                    {
                        foreach (ListViewItem li in lstQbItems.Items)
                        {
                            if (li.Tag == qib)
                            {
                                li.Selected = true;
                                li.EnsureVisible();

                                showError("Invalid Item", QbFile.FormatIsValidErrorMessage(qib, qib.IsValid));
                            }
                        }
                        return;
                    }

                    _pakFile.ReplaceFile(_qbFile.Filename, _qbFile);

                    btnSavePak.Enabled = false;
                }
                catch (Exception ex)
                {
                    showException("Save to PAK Error", ex);
                    return;
                }

                try
                {
                    _pakFormat.SaveDebugQbKey();
                }
                catch (Exception ex)
                {
                    showException("Save to User QB Key Error", ex);
                    return;
                }

                try
                {
                    if (_pakFormat.IsCompressed)
                    {
                        if (_pakFormat.PakFormatType == PakFormatType.XBox)
                        {
                            if (pakLen > _pakFormat.CompressedPakFilesize)
                                showError("PAK Size", string.Format("The PAK file is {0} bytes larger than the original", (pakLen - _pakFormat.CompressedPakFilesize).ToString()));

                            if (pabLen > _pakFormat.CompressedPabFilesize)
                                showError("PAB Size", string.Format("The PAB file is {0} bytes larger than the original", (pabLen - _pakFormat.CompressedPabFilesize).ToString()));

                        }
                    }

                }
                catch (Exception ex)
                {
                    showException("Compress Files Error", ex);
                    return;
                }

                refreshPakList();
                updateStatusItems();
            }
            finally
            {
                this.Cursor = Cursors.Default;
            }
        }