Time lag in SQL server connection

public static bool connectDB()
       {
           try
           {
               Variables var = new Variables();
               string connection = Properties.Settings.Default.serverUrl;

               var.connection = new SqlConnection(connection);
               var.connection.Open(); //takes time to execute this step
               {
                   //set of commands executes after time lag;
               }
               var.connection.Close();
               return true;

           }
           catch (Exception ex)
           {
               MessageBox.Show("Error while conneting to database" + ex.Message,"Demo",MessageBoxButtons.OK,MessageBoxIcon.Error);
               return false;
               throw;
           }

       }

Data Source=159.70.76.16;Initial Catalog=Itemsense;Integrated Security=True; max pool size=1000