Vfrdtyky

In my ViewModel, I'm calling NotifyMe() which does the following:

  SqlDependency.Start(ConfigurationManager.ConnectionStrings["StringConnexion"].ConnectionString);

        await _connection.OpenAsync();



        using (command = new SqlCommand(

            "SELECT  [NUM_DRC] ,[MAT_EMP] ,[NUM_RC] ,[DEBUT_DRC] ,[FIN_DRC],[DATE_ETAB_DRC] ,[MOTIF_DRC] ,[STATUS_DRC] FROM [dbo].[DEMANDE_RECUPERATION] WHERE [STATUS_DRC] = 'En attente' ",

            _connection))

        {

            dependency = new SqlDependency(command);

            dependency.OnChange += OnDependencyChange;

            using (reader = await command.ExecuteReaderAsync())

            {

                while (reader.Read())

                {

                    RcCount++;



                }



            }

        }



        using (command2 = new SqlCommand("SELECT[NUM_DC] ,[MAT_EMP] ,[NUM_CONGE] ,[DATE_ETAB_DC] ,[DC_DEBUT] ,[DC_FIN] ,[LIEU_JOUISSANCE] ,[STATUS_DC] FROM[dbo].[DEMANDE_CONGE] WHERE [STATUS_DC] = 'En attente'",

            _connection))

        {

            dependency2 = new SqlDependency(command2);

            dependency2.OnChange += OnDependencyChange2;

            using (reader2 = await command2.ExecuteReaderAsync())

            {

                while (reader2.Read())

                {

                    DcCount++;



                }



            }



        }





        using (command3 = new SqlCommand("SELECT[NUM_DAS],[MAT_EMP],[NUM_AS],[DATE_ETAB_DAS],[DEBUT_DAS],[FIN_DAS],[MOTIF_DAS],[STATUS_DAS] FROM[dbo].[DEMANDE_DE_SORTIE] WHERE [STATUS_DAS] = 'En attente' ",

            _connection))

        {

            dependency3 = new SqlDependency(command3);

            dependency3.OnChange += OnDependencyChange3;

            using (reader3 = await command3.ExecuteReaderAsync())

            {

                while (reader3.Read())

                {

                    AsCount++;



                }



            }



        }





        using (command4 = new SqlCommand("SELECT [NUM_DAB] ,[NUM_ABS],[MAT_EMP],[DATE_ETAB_DAB],[DEBUT_DAB],[FIN_DAB],[MOTIF_DAB],[STATUS_DAB] FROM [dbo].[DEMANDE_ABSENCE] WHERE [STATUS_DAB] = 'En attente' ",

            _connection))

        {

            dependency4 = new SqlDependency(command4);

            dependency4.OnChange += OnDependencyChange4;

            using (reader4 = await command4.ExecuteReaderAsync())

            {

                while (reader4.Read())

                {

                    AbsCount++;



                }



            }



        }











        using (command5 = new SqlCommand("SELECT [NUM_DMD],[NUM_MD],[MAT_EMP],[DATE_ETAB_DMD],[DEBUT_DMD],[FIN_DMD],[MOTIF_DMD],[STATUS_DMD] FROM [dbo].[DEMANDE_MD] WHERE [STATUS_DMD] = 'En attente' ",

            _connection))

        {

            dependency5 = new SqlDependency(command5);

            dependency5.OnChange += OnDependencyChange5;

            using (reader5 = await command5.ExecuteReaderAsync())

            {

                while (reader5.Read())

                {

                    MdCount++;



                }



            }



        }

In my computer, everything is running fine.

I tried to run the same application in my friend's laptop, and the application is opening for 1 second then close with no error messages or anything. If I remove the NotifyMe(), It works fine.

Where would the issue be in this case? I can't do debugging on that PC since I don't have Visual studio, how do you suggest me to go in that case?