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Remove extra S #119

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2 changes: 1 addition & 1 deletion README.md
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Expand Up @@ -107,7 +107,7 @@ public class MyCPUIntensiveService {

### BlazorWorker.BackgroundService: Configure serialization (starting v4.1.0)

Expressions are being serialized with [Serialize.Linq](https://www.nuget.org/packages/Serialize.Linq) by default before being sent over to the worker. Sometimes, when using structured data, particularily when using abstract classes, you may get an exception. The exception messsage may mention something like "Add any types not known statically to the list of known types - for example, by using the KnownTypeAttribute attribute or by adding them to the list of known types passed to DataContractSerializer.". You can follow the first advice by adding [KnownTypeAttribute](https://learn.microsoft.com/fr-fr/dotnet/api/system.runtime.serialization.knowntypeattribute?view=net-8.0) to some classes, but sometimes it wont be possible (maybe the classes aren't yours).
Expressions are being serialized with [Serialize.Linq](https://www.nuget.org/packages/Serialize.Linq) by default before being sent over to the worker. Sometimes, when using structured data, particularily when using abstract classes, you may get an exception. The exception message may mention something like "Add any types not known statically to the list of known types - for example, by using the KnownTypeAttribute attribute or by adding them to the list of known types passed to DataContractSerializer.". You can follow the first advice by adding [KnownTypeAttribute](https://learn.microsoft.com/fr-fr/dotnet/api/system.runtime.serialization.knowntypeattribute?view=net-8.0) to some classes, but sometimes it wont be possible (maybe the classes aren't yours).

To follow the second advice, "passing types to DataContractSerializer", you may configure serialization more in detail. BlazorWorker.BackgroundService uses a default implementation of [IExpressionSerializer](https://github.com/Tewr/BlazorWorker/blob/61bb7bf3453761cfcaebd56d49acc752c127ce40/src/BlazorWorker.WorkerBackgroundService/IExpressionSerializer.cs#) to serialize expressions. You may provide a custom implementation, and pass the type of this class to [IWorkerInitOptions](/blob/4c9f1320c22f90e4d6e954238ad9b1e0e3f627ce/src/BlazorWorker.WorkerCore/InitOptions.cs).[UseCustomExpressionSerializer](/blob/4c9f1320c22f90e4d6e954238ad9b1e0e3f627ce/src/BlazorWorker.ServiceFactory/WorkerInitExtension.cs#L17) when initializing your service. The most common configuration will be to add some types to `AddKnownTypes`, so for that paricular scenario you can use a provided base class as shown below.

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