EXe is not working if outlook 2010 is closed

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C#2.0

C#

Hi,
I create exe for sending the email parameter
to outlook(likeTo,Subject and path of the attachement file ),its working fine for outlook 2013 but when i use it for outlook 2010 then ,if outlook 2010 is open then it woking fine but when outlook 2010 is closed then at that time my exe is not working. I also mention my code in below
so, please check and if possible then give me the solution.

static void Main(string[] args)
        {
            string to, sub,  path;
            to = sub = path = string.Empty;

            Console.WriteLine("Enter to");
            to = Console.ReadLine();
            Console.WriteLine("Enter sub");
            sub = Console.ReadLine();
            
            Console.WriteLine("Enter path");
            path = Console.ReadLine();
            Console.WriteLine("Please Wait....");
            CreateMessageWithAttachment(path, to, sub);

        }
        public static void CreateMessageWithAttachment(string path, string to, string subject)
        {
            try
            {

                Outlook.Application oApp = new Outlook.Application();
                Outlook.MailItem email = (Outlook.MailItem)(oApp.CreateItem(Outlook.OlItemType.olMailItem));

                #region set email recipients
                {


                    email.Recipients.Add(to);
                }
                #endregion

                //email subject                 
                email.Subject = subject;

                #region set email Text
                {

                   // email.Body = body;
                }
                #endregion

                #region email attachment
                {
                    if (File.Exists(path))
                    {
                       // int iPosition = (int)email.Body.Length + 1;
                        int iAttachType = (int)Outlook.OlAttachmentType.olByValue;
                        Outlook.Attachment oAttach = email.Attachments.Add(path, iAttachType);
                    }
                }
                #endregion

                email.Display();

            }
            catch (Exception e)
            {
            }

        }

Thanks
hasan