private async void ConnectToOracleOwnConnString_OnExecuted(object sender, ExecutedRoutedEventArgs e)
        {
            var example =
                @"USER ID=c##username;PASSWORD=y0urP455woRd;DATA SOURCE=""(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.14.10)(PORT=1521)))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=orcl)))""";
            var res = await this.ShowInputAsync("Connection string", $"Use customized connection string \n (Example: {example})");

            if (res != null)
            {
                await DiagramFacade.CloseDiagramsOnDisconnect(this);

                SessionProvider.Instance.Disconnect();
                DatabaseConnectionSidebar.HideDatabaseStackPanels();

                ProgressDialogController progressDialogController = null;

                Func <ProgressDialogController, Task> closeProgress = async t =>
                {
                    if (t != null)
                    {
                        if (t.IsOpen)
                        {
                            await t.CloseAsync();
                        }
                    }
                };

                try
                {
                    progressDialogController = await this.ShowProgressAsync("Please wait", "Connecting to server...", false, new MetroDialogSettings()
                    {
                        AnimateShow = false,
                        AnimateHide = false
                    });

                    progressDialogController.SetIndeterminate();

                    var db = new OracleDatabase();
                    OracleConnectionStringBuilder builder = new OracleConnectionStringBuilder(res);
                    builder.ConnectionTimeout = 2;

                    await db.TryToConnectToServer(builder.ConnectionString);

                    SessionProvider.Instance.OwnConnectionString    = res;
                    SessionProvider.Instance.UseOwnConnectionString = true;
                    SessionProvider.Instance.Username       = builder.UserID;
                    SessionProvider.Instance.ConnectionType = ConnectionType.Oracle;

                    //Init work
                    await Task.Factory.StartNew(() =>
                    {
                        using (IOracleMapper mapper = new OracleMapper())
                        {
                            TableModel model = mapper.ListTables().FirstOrDefault();
                            if (model != null)
                            {
                                mapper.ListForeignKeys(model.Title);
                            }
                        }
                    });

                    await closeProgress(progressDialogController);

                    await this.ShowMessageAsync("Connected", $"Successfuly connected to server");

                    var flyout = Flyouts.Items[2] as Flyout;

                    if (flyout != null)
                    {
                        flyout.IsOpen = !flyout.IsOpen;
                    }

                    await DatabaseConnectionSidebar.LoadOracleData();
                }
                catch (OracleException exception)
                {
                    await closeProgress(progressDialogController);

                    await this.ShowMessageAsync("Connection error", exception.Message);

                    Output.WriteLine(OutputPanelListener.PrepareException(exception.Message));
                    SessionProvider.Instance.ConnectionType = ConnectionType.None;
                }
                catch (ArgumentException)
                {
                    await closeProgress(progressDialogController);

                    await this.ShowMessageAsync("Connection error", "Connection string is not valid");

                    SessionProvider.Instance.ConnectionType = ConnectionType.None;
                }
            }
        }