Is there any class in Mavlink c # where you can take all the parameters as in the Status mission planner?

[Hrak_Dovlatyan]

And can you tell me how to take specifically value in data?

[Eosbandi (Andras Schaffer)]

It’c called Mavlink Parameter Microservice and you have to implement is using mavlink packets.
http://mavlink.io/en/services/parameter.html