Fixes: U4-4005 Member custom properties not saving from code, only from backend, wraps more of the getter functions in legacy member class with new member service methods, fixes paged result method when there are no results.

src/Umbraco.Core/Persistence/Caching/RuntimeCacheProvider.cs

@@ -151,6 +151,21 @@ namespace Umbraco.Core.Persistence.Caching
             _keyTracker.Remove(key);
         }
 
+        public void Delete(Type type, int entityId)
+        {
+            var key = GetCompositeId(type, entityId);
+            if (_memoryCache != null)
+            {
+                _memoryCache.Remove(key);
+            }
+            else
+            {
+                HttpRuntime.Cache.Remove(key);
+            }
+
+            _keyTracker.Remove(key);
+        }
+
         /// <summary>
         /// Clear cache by type
         /// </summary>

src/Umbraco.Core/Persistence/Repositories/MemberRepository.cs

@@ -512,6 +512,10 @@ namespace Umbraco.Core.Persistence.Repositories
             totalRecords = Convert.ToInt32(pagedResult.TotalItems);
 
             //now that we have the member dto's we need to construct true members from the list.
+            if (totalRecords == 0)
+            {
+                return Enumerable.Empty<IMember>();
+            }
             var result = GetAll(pagedResult.Items.Select(x => x.NodeId).ToArray());
             
             //now we need to ensure this result is also ordered by the same order by clause

src/Umbraco.Core/Persistence/Repositories/UserRepository.cs

@@ -298,6 +298,11 @@ namespace Umbraco.Core.Persistence.Repositories
             totalRecords = Convert.ToInt32(pagedResult.TotalItems);
 
             //now that we have the user dto's we need to construct true members from the list.
+            if (totalRecords == 0)
+            {
+                return Enumerable.Empty<IUser>();
+            }
+
             var result = GetAll(pagedResult.Items.Select(x => x.Id).ToArray());
 
             //now we need to ensure this result is also ordered by the same order by clause