public void DeleteUserSelectedHosts()
 {
     foreach (UserSelectedTaxonUsage hostUsage in Enum.GetValues(typeof(UserSelectedTaxonUsage)))
     {
         SpeciesFactManager.AddUserSelectedHosts(GetContext(), TaxonManagerTest.GetSomeTaxonIds(), hostUsage);
         SpeciesFactManager.DeleteUserSelectedHosts(GetContext());
     }
 }