private void BuildNavigationPaths()
{
var path = new List <List <Type> >();
for (int entity = 0; entity < Entities.Count; entity++)
{
var row = new List <Type>();
row.Add(Entities[entity]);
var referrals = NavigationRelations[entity].Where(e => !row.Contains(e)).ToList();
foreach (var referral in referrals)
{
row.Add(referral);
path.Absorb(row);
row.Remove(referral);
}
}
}