Now can change forum data

BL/Services/FoorumService.cs

@@ -72,9 +72,13 @@ namespace BL.Services
             throw new NotImplementedException();
         }
 
-        public void Update(FoorumDTO foorum)
+        public FoorumDTO Update(FoorumDTO foorum)
         {
-            throw new NotImplementedException();
+            var domain = _foorumRepository.GetById(foorum.FoorumId);
+            domain = _factory.Update(domain, foorum);
+            _foorumRepository.Update(domain);
+            _foorumRepository.SaveChanges();
+            return _factory.Create(domain);
         }
     }
 }