Updated ExposeServices attribute.

docs/en/Customizing-Application-Modules-Overriding-Services.md

@@ -60,7 +60,7 @@ In most cases, you will want to change one or a few methods of the current imple
 
 ````csharp
 [Dependency(ReplaceServices = true)]
-[ExposeServices(typeof(IdentityUserAppService))]
+[ExposeServices(typeof(IIdentityUserAppService), typeof(IdentityUserAppService))]
 public class MyIdentityUserAppService : IdentityUserAppService
 {
     //...
@@ -263,4 +263,4 @@ See [Overriding the User Interface](Customizing-Application-Modules-Overriding-U
 
 ## How to Find the Services?
 
-[Module documents](Modules/Index.md) includes the list of the major services they define. In addition, you can investigate [their source code](https://github.com/abpframework/abp/tree/dev/modules) to explore all the services.
+[Module documents](Modules/Index.md) includes the list of the major services they define. In addition, you can investigate [their source code](https://github.com/abpframework/abp/tree/dev/modules) to explore all the services.