public static async Task LockExtAsync(this XtraForm xtraForm, Func<Task> onLock) { IOverlaySplashScreenHandle handle = null; try { handle = SplashScreenManager.ShowOverlayForm(xtraForm); await onLock(); } finally { SplashScreenManager.CloseOverlayForm(handle); } } // USAGE await form.LockExtAsync(async () => { // Login here });
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