Fix for proper api usage

Author: ozantopal

EnLock/EnExtention.cs

@@ -79,7 +79,7 @@ public static async Task<T> ToFirstWithNoLockAsync<T>(this IQueryable<T> query,
                                     },
                                     TransactionScopeAsyncFlowOption.Enabled))
             {
-                result = await query.FirstOrDefaultAsync(cancellationToken);
+                result = await query.FirstAsync(cancellationToken);
                 scope.Complete();
             }
             return result;