//Method to delete a choosed task
 public void DeleteTask()
 {
     if (File.Exists("Task.json"))
     {
         _view.ListTasks(_jsonTask.ListAllTasks());
         _jsonTask.DeleteTask(_view.TaskChoice());
         Continue();
     }
     else
     {
         _view.NoTasks();
         Continue();
     }
 }
 public void DeleteTask(string taskname)
 {
     _jsonTask.DeleteTask(taskname);
 }