protected override void Arrange()
        {
            base.Arrange();

            uiService = new Mock<IUIServiceWpf>();
            uiService.Setup(x => x.ShowError(It.IsAny<Exception>(), It.IsAny<string>()))
                .Verifiable("ShowError not displayed.");

            command = new ExceptionThrowingCommandModel(uiService.Object);
        }
        protected override void Arrange()
        {
            base.Arrange();

            uiService = new Mock <IUIServiceWpf>();
            uiService.Setup(x => x.ShowError(It.IsAny <Exception>(), It.IsAny <string>()))
            .Verifiable("ShowError not displayed.");

            command = new ExceptionThrowingCommandModel(uiService.Object);
        }