Inconsistant use of dotnet versions

[KjellRanda]

I believe there is an inconsistancy in the use of dotnet versions between the Dockerfile (6.0) and the csproj files (7.0).
Copeied the projet e few days ago and the only way I was able to build a new image was to change the Dockerfile to use 7.0
On my rpi4 i used dotnet-7.0.400 without problems.

[gmeks]

Correct you are.

I also have to change xElectricityPriceApi to use the new "suppert" system. Not that i think other then me use it :)