Add UnitOfWorkManager to ApplicationService.

src/Volo.Abp/Volo/Abp/Application/Services/ApplicationService.cs

@@ -1,9 +1,14 @@
 using Volo.Abp.ObjectMapping;
+using Volo.Abp.Uow;
 
 namespace Volo.Abp.Application.Services
 {
     public abstract class ApplicationService : IApplicationService
     {
+        public IUnitOfWorkManager UnitOfWorkManager { get; set; }
+        
         public IObjectMapper ObjectMapper { get; set; }
+
+        protected IUnitOfWork CurrentUnitOfWork => UnitOfWorkManager.Current;
     }
 }