The application is visible in the Windows app switching menu when the user press "Alt+Tab" on the keyboard: the application should not be visible here when running in background. If the item is focused, a bug occured when clicking on the "OK" button: the application doesn't minimize properly.

Switch the entire code to Visual Studio version 2015.

Remove double quotes on the notification balloon title when a new message is received.

When your computer starts and the application is loading, if you don't have internet connection yet, an internet error or an authentication error may occured. This is the current behavior. For this to be transparent to the user, it is necessary that the application launches silently and performs a check the first minutes of network availability.

The user settings must be retained after application update.

Add a simple picture to preview the privacy setting.

Display the gmail account name currently logged on to the application.

Add a parameter allowing the user to choose the number format of the notification icon: total unread messages or total unread threads.

Add a parameter allowing the user to display a warning notification when a network error occured.

Allow the application to automatically download and install the update package when a new update is available. A user setting will be created to define if the user want the package to be automatically installed when the download is complete.

Allow the user to leave a feedback on the application usage. This feedback option will send a mail to the developer.

When the application credential are missing on the first startup, the synchronization failed because the application does not have access to the gmail account.

Displays inbox statistics: number of emails, spams, list of labels, and other interesting statistics.

The networks notifications are not usefull and should be removed in the next version.

An error occurs when the application is trying to mark as read a message that have already been readed in gmail.

Allow the user to block all incoming notifications during a certain time.

Add a parameter allowing the user to display a warning notification when a SPAM is received.

When the timeout mode is activated, a double click on the systray icon makes the timeout icon disappear.

When the setting "Ask me before leaving the application" is enabled, Windows shutdown process is unable to complete successfully without a user prompt that ask the user to force the application to stop. The application must disable the prompt when the computer is going to shutdown.

Pause the application when Windows is going into sleep mode or hibernate state. This will hide some network errors thats occurs during wake up.

http://stackoverflow.com/questions/18206183/event-to-detect-system-wake-up-from-sleep-in-c-sharp

Add a welcome message on the first load of Gmail notifier to indicates that the application is working in the taskbar: defer the load of the first synchronization. A specific application setting will be created to indicates the save the first load state.

As proposed by @dieterhatnkleinen, the interface will be translated into German in a next version.

Allow the user to set the application update process. Instead of have a manual update, the application could check update every weeks, months, etc. The importance of this feature is that the application must let the control to the user.

The application is able to run on Windows 10 startup but is unable to synchronize the inbox at this execution time.

Allow the user to synchronize the inbox by clicking on the systray icon: a simple left click will do the job.

Add a new setting to allow the user to open "inbox" instead of "gmail".

New application interface design based on new Photoshop template. In collaboration with @shadox.

Switch the entire code to Visual Studio version 2017.

Add a section allowing the user to check if there is a new update/release of the application on Github.

The application is unable to detect a new version on Github when only the build number is changing. Eg: when the version number change from v1.1.3.0 to v1.1.3.7, the application says that the user have the latest version installed.

Add a parameter allowing the user to allow the application to reconnect itself when a network error occured: Yes/No option with a delay of 10 seconds and a timer countdown. After 3 attemps, the reconnect process stops.

When a spam is present in your inbox, the application is showing the spam notification on every synchronization. According to the notification policy, this behavior is abnormal.

Translate all the interface in English.

When the user is clicking on a balloon notification for new email, the application must open the specified email in the browser.

Stores all the referenced dlls in a single folder. Documentation link: http://stackoverflow.com/questions/4971807/storing-referenced-dlls-in-visual-studio-solution-folder.

Provide a portable version of the software and a setup installer (x86/x64), based on Inno Setup program.

When the application credential are changed, the application is unable to clear previous credentials: an option must be added in the settings to allow the user to clear the current credential (token file in AppData) and restart the application.

When the operating system exit the sleep mode, the application failed to synchronize the inbox.

Add a parameter allowing the user to display a message snippet when a single message is received.

Adds a description on every control that can be described with the help button:

Enables the "Run at Windows startup" option in the settings panel to allow the user to launch Gmail Notifier on Windows startup.

Add a "release version link" to allow the user to jump in the Github release section of the current build: this link could be generated dynamically, based on the application version number and attached to the version number label.

When the notification icon is clicked, the application open a new tab in the default web browser with the gmail address but doesn't check if there is already a tab running with this address. This optimisation will save the process id on the first load and then focus the process on the second double click instead of opening a new tab.

A fatal non-managed exception occured at startup when the application is installed "from scratch".

Upgrade the Visual Studio project to .NET Framework 4.6.1.

Show multiple demo screens of the application on Github in a simple gallery.

When the privacy setting is set to display some fields of a received message, an error occured when this fields are empty: a balloon tip must have a non-empty title/text value.

The SPAM notification setting must synchronize the inbox when modified.

After updating the application, a message appears once and indicates that a new version is available again.

When the application is starting up with no internet connection, the error message relating the authentication error is shown. On startup, the status of the internet connection will be checked.