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>>Now i need a Data Application for this which runs unlimited. Which can not be suspended like an UWP Application.
Maybe you don't need to write it in WPF, since Windows Creators Update (version 1703), UWP apps could run in the background indefinitely. So you can implement it in a UWP way.
- The first approach is that your UWP app could run while it is minimized with extended execution.
- The second is that you could make the background task of your app run in the background indefinitely with the extendedBackgroundTaskTime restricted capability.
Please note both of the solutions only work for sideloading apps.
For more information, please refer to this document: Run in the background indefinitely.
Thank you.