private static void AddExsistingTrait(Person selectedPerson, TraitRepository traitRepository, PersonRepository personRepository, GenotypeRepository genotypeRepository, RealRandomNumberGenerator rng, GeneticCounsellorDbContext context)
{
Console.Clear();
Console.WriteLine("Already exsisting Traits:");
int num = 0;
foreach (var t in traitRepository.ListTraits())
{
Console.WriteLine(num + ") " + t);
num++;
}
Console.WriteLine("Select a trait from the list:");
int traitIndex = Convert.ToInt32(Console.ReadLine());
var allTraits = traitRepository.ListTraits();
Trait chosenTrait = allTraits[traitIndex];
selectedPerson.AddTraitToPerson(chosenTrait);
Console.WriteLine("Select which genotype to add to person:");
chosenTrait.GenerateGenotypesForATrait(genotypeRepository);
AddExsistingGenotype(traitRepository, selectedPerson, genotypeRepository, personRepository, rng, context);
context.SaveChanges();
PersonScreen(traitRepository, selectedPerson, personRepository, genotypeRepository, rng, context);
}