Init commit

Repositories/InMemGerbilRepository.cs

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+using GerbilManager.Models;
+
+namespace GerbilManager.Repositories
+{
+
+    public class InMemGerbilRepository
+    {
+        private readonly List<Gerbil> _gerbilList = new()
+        {
+            new Gerbil() {Id = Guid.NewGuid(), Name = "Blacky", Breeder = null, Litter = null, Gender = Gender.unknown},
+            new Gerbil() {Id = Guid.NewGuid(), Name = "Coocky", Breeder = null, Litter = null, Gender = Gender.male},
+            new Gerbil() {Id = Guid.NewGuid(), Name = "Lazy", Breeder = null, Litter = null, Gender = Gender.female}
+        };
+
+        public IEnumerable<Gerbil> GetGerbils()
+        {
+            return _gerbilList;
+        }
+
+        public Gerbil GetGerbil(Guid id) => _gerbilList.SingleOrDefault(x => x.Id == id);
+    }
+    
+}