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Update Application-Services.md to explain how to handle file in app services. #5717

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Oct 6, 2020
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Update Application-Services.md to explain how to handle file in app services. #5717

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6 changes: 6 additions & 0 deletions docs/en/Best-Practices/Application-Services.md
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Expand Up @@ -213,6 +213,12 @@ This method votes a question and returns the current score of the question.
* **Do** always get all the related entities from repositories to perform the operations on them.
* **Do** call repository's Update/UpdateAsync method after updating an entity. Because, not all database APIs support change tracking & auto update.

#### Handle files

* **Do not** use any file-related components(like `IFormFile`) or `Stream` in the application service interface. You can use primitive types as file parameters. Such as `byte[]`.
* **Do** use a controller to handle file upload and call a application service method.


#### Using Other Application Services

* **Do not** use other application services of the same module/application. Instead;
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