How to: Prompt the User to Save Unsaved Files

A useful function the DTE has a built in is to prompt the user to save any unsaved files.  It is a good idea to make this call in when shutting down the DTE, for example in the disconnect method of the VstaDesignTimeIntegration class.   

EnvDTE.vsPromptResult promptResult = this.dte.ItemOperations.PromptToSave;

internal void Disconnect()
{
    //prompt the user to save any unsaved files
    EnvDTE.vsPromptResult promptResult = this.dte.ItemOperations.PromptToSave; 

    this.isShuttingDown = true;

    StopDebugging(true); 

    // Unload external process
    try
    {
        if (this.macroAddInProcess != null)
        {
            this.macroAddInProcess.ShuttingDown -= MacroAddInProcessExiting;
            this.macroAddInProcess.Shutdown();
            this.macroAddInProcess = null;
        }
    }
    catch (Exception ex)
    {
        //  Swallow the exception. We don't want to crash if the process has already been destroyed.
        System.Diagnostics.Debug.WriteLine(ex.ToString());
    }
}