Displaying a Custom Dialog in WPF Before the Main Application Window is Shown

protected override void OnStartup(StartupEventArgs e)
 {
            Application.Current.ShutdownMode = ShutdownMode.OnExplicitShutdown;
            CustomDialog dialog = new CustomDialog ();
            bool? dialogResult = auth.ShowDialog();
            /* Handle results */
            if (dialogResult.HasValue && dialogResult.Value)
            {
                base.OnStartup(e);
            }
            else
            {
                this.Shutdown();
            }
}

Daniel is a former senior engineer in Technology and Research at the Office of the CTO at Microsoft, working on next generation systems.

Previously Daniel was a nine-time Microsoft MVP and co-founder of Outcoder, a Swiss software and consulting company.

Daniel is the author of Windows Phone 8 Unleashed and Windows Phone 7.5 Unleashed, both published by SAMS.

Daniel is the developer behind several acclaimed mobile apps including Surfy Browser for Android and Windows Phone. Daniel is the creator of a number of popular open-source projects, most notably Codon.

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