Using TopShelf and FluentScheduler NUGET packages can unlock powerful and repeatable Microservices.
To get started Create a .NET Framework console application and install the TopShelf Nuget Package.
Then learn by example.
If you have something that needs to execute on a regular interval check out this sample application: <a href="https://github.com/woodman231/NetFrameworkConsoleApplicationWithTopShelfAndFluentScheduler" target="_blank" rel="noopener">https://github.com/woodman231/NetFrameworkConsoleApplicationWithTopShelfAndFluentScheduler</a>
If you have something that needs to respond to the generation of a new file, or a folder listener check out this sample application: <a href="https://github.com/woodman231/NetFrameworkConsoleApplicationWithTopShelfFileWatcher" target="_blank" rel="noopener">https://github.com/woodman231/NetFrameworkConsoleApplicationWithTopShelfFileWatcher</a>
Instruction on getting the console application off of your development computer to a service application server are in the README's of these repositories.
Personally I have found that these microservices are more configurable and can have better logic and more options to create ETL processes than just SSIS packages.

This article describes how to create a microservice from a .NET Framework Console Application

Use your .NET Framework Skills to build a Microservice

This might only be useful in edge cases where your application has access to the file system with state that is needed to be persisted, and a standard SQL database might not be appropriate.
In any case this this project showcases my skills to create a class library, and unit tests. It also shows my skills with GIT and communication / technical writing skills through a README.md file.
<a href="https://github.com/woodman231/AspNetCoreJsonFolderRepository" target="_blank" rel="noopener">https://github.com/woodman231/AspNetCoreJsonFolderRepository</a>

This project showcases my skills to create a class library, and unit tests. It also shows my skills with GIT and communication skills through a README.md file.

C# - Use a Folder Containing JSON Files as a Defacto Database

C# web programming language. Here I have written a few articles to show case my skills with the C# programming language in general.

CSharp

Use your .NET Framework Skills to build a Microservice

C# - Use a Folder Containing JSON Files as a Defacto Database