Update Background-Workers.md

docs/en/Background-Workers.md

@@ -80,7 +80,7 @@ public class PassiveUserCheckerWorker : AsyncPeriodicBackgroundWorkerBase
 
 ## Register Background Worker
 
-After creating a background worker class, you should to add it to the `IBackgroundWorkerManager`. The most common place is the `OnApplicationInitialization` method of your module class:
+After creating a background worker class, you should add it to the `IBackgroundWorkerManager`. The most common place is the `OnApplicationInitialization` method of your module class:
 
 ````csharp
 [DependsOn(typeof(AbpBackgroundWorkersModule))]
@@ -137,4 +137,4 @@ ABP Framework's background worker system is good to implement periodic tasks. Ho
 
 ## See Also
 * [Quartz Integration for the background workers](Background-Workers-Quartz.md) 
-* [Background Jobs](Background-Jobs.md)
+* [Background Jobs](Background-Jobs.md)