Close app view and then delete the app file

TestForRick.cs

using System;
using System.IO;
using ICSharpCode.Core;
using ICSharpCode.SharpDevelop.Gui;
using SoftVelocity.Generator.UI;

namespace ClarionAddins
{
    public class TestForRick : AbstractMenuCommand
    {
        private string _fileToDelete;
        public override void Run()
        {
            IWorkbenchWindow window = WorkbenchSingleton.Workbench.ActiveWorkbenchWindow;
            if (window != null && 
                window.ActiveViewContent is SoftVelocity.Generator.UI.ApplicationMainWindowControl_ViewContent)
            {
                _fileToDelete = window.ViewContent.FileName;
                if (MessageService.AskQuestion("Close and delete file?\r\nFile: " + _fileToDelete, "TestForRick"))
                {
                    ((ApplicationMainWindowControl_ViewContent)window.ActiveViewContent).App.Closed += App_Closed;
                    window.CloseWindow(true);
                }
            }
        }

        void App_Closed(object sender, SoftVelocity.Generator.ApplicationEventArgs e)
        {
            try
            {
                File.Delete(_fileToDelete);
            }
            catch (Exception ex)
            {
                MessageService.ShowMessage("An Exception occurred: " + ex.ToString());
            }
        }
    }
}