diff --git a/src/Umbraco.Core/Persistence/Repositories/MemberGroupRepository.cs b/src/Umbraco.Core/Persistence/Repositories/MemberGroupRepository.cs
index c636bf19bf..c15cd73619 100644
--- a/src/Umbraco.Core/Persistence/Repositories/MemberGroupRepository.cs
+++ b/src/Umbraco.Core/Persistence/Repositories/MemberGroupRepository.cs
@@ -5,14 +5,10 @@ using NPoco;
 using Umbraco.Core.Events;
 using Umbraco.Core.Logging;
 using Umbraco.Core.Models;
-using Umbraco.Core.Models.EntityBase;
 using Umbraco.Core.Models.Rdbms;
-
 using Umbraco.Core.Persistence.Factories;
 using Umbraco.Core.Persistence.Querying;
-using Umbraco.Core.Persistence.SqlSyntax;
 using Umbraco.Core.Persistence.UnitOfWork;
-using Umbraco.Core.Services;
 using Umbraco.Core.Cache;
 using Umbraco.Core.Persistence.Mappers;
 
@@ -24,8 +20,7 @@ namespace Umbraco.Core.Persistence.Repositories
     {
         public MemberGroupRepository(IDatabaseUnitOfWork work, CacheHelper cache, ILogger logger, IMappingResolver mappingResolver)
             : base(work, cache, logger, mappingResolver)
-        {
-        }
+        { }
 
         private readonly MemberGroupFactory _modelFactory = new MemberGroupFactory();
 
@@ -96,10 +91,7 @@ namespace Umbraco.Core.Persistence.Repositories
             return list;
         }
 
-        protected override Guid NodeObjectTypeId
-        {
-            get { return new Guid(Constants.ObjectTypes.MemberGroup); }
-        }
+        protected override Guid NodeObjectTypeId => new Guid(Constants.ObjectTypes.MemberGroup);
 
         protected override void PersistNewItem(IMemberGroup entity)
         {
@@ -107,7 +99,7 @@ namespace Umbraco.Core.Persistence.Repositories
             var group = (MemberGroup)entity;
             group.AddingEntity();
             var dto = _modelFactory.BuildDto(group);
-            var o = Database.IsNew<NodeDto>(dto) ? Convert.ToInt32(Database.Insert(dto)) : Database.Update(dto);
+            var o = Database.IsNew(dto) ? Convert.ToInt32(Database.Insert(dto)) : Database.Update(dto);
             group.Id = dto.NodeId; //Set Id on entity to ensure an Id is set
             
             //Update with new correct path and id            
@@ -130,7 +122,7 @@ namespace Umbraco.Core.Persistence.Repositories
         public IMemberGroup GetByName(string name)
         {
             return RuntimeCache.GetCacheItem<IMemberGroup>(
-                string.Format("{0}.{1}", typeof (IMemberGroup).FullName, name),
+                typeof (IMemberGroup).FullName + "." + name,
                 () =>
                 {
                     var qry = QueryFactory.Create<IMemberGroup>().Where(group => group.Name.Equals(name));
@@ -161,7 +153,6 @@ namespace Umbraco.Core.Persistence.Repositories
                 return null;
             }
 
-            // fixme - in a repository?!
             SavedMemberGroup.RaiseEvent(new SaveEventArgs<IMemberGroup>(grp), this);
 
             return grp;
@@ -284,11 +275,7 @@ namespace Umbraco.Core.Persistence.Repositories
             //get the groups that are currently assigned to any of these members
 
             var assignedSql = Sql()
-                .Select(string.Format(
-                    "{0},{1},{2}",
-                    SqlSyntax.GetQuotedColumnName("text"),
-                    SqlSyntax.GetQuotedColumnName("Member"),
-                    SqlSyntax.GetQuotedColumnName("MemberGroup")))
+                .Select($"{SqlSyntax.GetQuotedColumnName("text")},{SqlSyntax.GetQuotedColumnName("Member")},{SqlSyntax.GetQuotedColumnName("MemberGroup")}")
                 .From<NodeDto>()
                 .InnerJoin<Member2MemberGroupDto>()
                 .On<NodeDto, Member2MemberGroupDto>(dto => dto.NodeId, dto => dto.MemberGroup)
@@ -345,6 +332,8 @@ namespace Umbraco.Core.Persistence.Repositories
             public int MemberGroupId { get; set; }
         }
 
+        // todo - understand why we need these two repository-level events, move them back to service
+
         /// <summary>
         /// Occurs before Save
         /// </summary>
diff --git a/src/Umbraco.Core/Persistence/Repositories/PermissionRepository.cs b/src/Umbraco.Core/Persistence/Repositories/PermissionRepository.cs
index 49ee8664a7..bf837e87c5 100644
--- a/src/Umbraco.Core/Persistence/Repositories/PermissionRepository.cs
+++ b/src/Umbraco.Core/Persistence/Repositories/PermissionRepository.cs
@@ -39,17 +39,17 @@ namespace Umbraco.Core.Persistence.Repositories
         /// </summary>
         /// <param name="userId"></param>
         /// <param name="entityIds"></param>
-        /// <returns></returns>        
+        /// <returns></returns>
         public IEnumerable<EntityPermission> GetUserPermissionsForEntities(int userId, params int[] entityIds)
         {
             var entityIdKey = string.Join(",", entityIds.Select(x => x.ToString(CultureInfo.InvariantCulture)));
             return _runtimeCache.GetCacheItem<IEnumerable<EntityPermission>>(
                 string.Format("{0}{1}{2}", CacheKeys.UserPermissionsCacheKey, userId, entityIdKey),
                 () =>
-        {            
+        {
 
                     var whereBuilder = new StringBuilder();
-            
+
                     //where userId = @userId AND
                     whereBuilder.Append(SqlSyntax.GetQuotedColumnName("userId"));
                     whereBuilder.Append("=");
@@ -85,13 +85,13 @@ namespace Umbraco.Core.Persistence.Repositories
                     return ConvertToPermissionList(result);
 
                 },
-                //Since this cache can be quite large (http://issues.umbraco.org/issue/U4-2161) we will only have this exist in cache for 20 minutes, 
+                //Since this cache can be quite large (http://issues.umbraco.org/issue/U4-2161) we will only have this exist in cache for 20 minutes,
                 // then it will refresh from the database.
                 new TimeSpan(0, 20, 0),
                 //Since this cache can be quite large (http://issues.umbraco.org/issue/U4-2161) we will make this priority below average
                 priority: CacheItemPriority.BelowNormal);
 
-        } 
+        }
 
         /// <summary>
         /// Returns permissions for all users for a given entity
@@ -148,7 +148,6 @@ namespace Umbraco.Core.Persistence.Repositories
             _unitOfWork.Database.BulkInsertRecords(SqlSyntax, toInsert);
 
             //Raise the event
-            // fixme - in the repository?
             AssignedPermissions.RaiseEvent(
                 new SaveEventArgs<EntityPermission>(ConvertToPermissionList(toInsert), false), this);
         }
@@ -181,10 +180,9 @@ namespace Umbraco.Core.Persistence.Repositories
             _unitOfWork.Database.BulkInsertRecords(SqlSyntax, actions);
 
             //Raise the event
-            // fixme - in the repo?
             AssignedPermissions.RaiseEvent(
                 new SaveEventArgs<EntityPermission>(ConvertToPermissionList(actions), false), this);
-        } 
+        }
 
         /// <summary>
         /// Assigns one permission to an entity for multiple users
@@ -199,7 +197,7 @@ namespace Umbraco.Core.Persistence.Repositories
             db.Execute("DELETE FROM umbracoUser2NodePermission WHERE nodeId=@nodeId AND permission=@permission AND userId in (@userIds)",
                 new
                 {
-                    nodeId = entity.Id, 
+                    nodeId = entity.Id,
                     permission = permission.ToString(CultureInfo.InvariantCulture),
                     userIds = userIds
                 });
@@ -214,7 +212,6 @@ namespace Umbraco.Core.Persistence.Repositories
             _unitOfWork.Database.BulkInsertRecords(SqlSyntax, actions);
 
             //Raise the event
-            // fixme - in the repo?!
             AssignedPermissions.RaiseEvent(
                 new SaveEventArgs<EntityPermission>(ConvertToPermissionList(actions), false), this);
         }
@@ -243,7 +240,6 @@ namespace Umbraco.Core.Persistence.Repositories
             _unitOfWork.Database.BulkInsertRecords(SqlSyntax, actions);
 
             //Raise the event
-            // fixme - in the repo?
             AssignedPermissions.RaiseEvent(
                 new SaveEventArgs<EntityPermission>(ConvertToPermissionList(actions), false), this);
         }
@@ -264,6 +260,8 @@ namespace Umbraco.Core.Persistence.Repositories
             return permissions;
         }
 
+        // todo - understand why we need this repository-level event, move it back to service
+
         public static event TypedEventHandler<PermissionRepository<TEntity>, SaveEventArgs<EntityPermission>> AssignedPermissions;
     }
 }
\ No newline at end of file