How to use a function with an already existing token?

Question

C++ / C#

For example, I want to send a message, but I need to make sure that the message is sent exclusively from the token that I specify, that is, for this I don’t even have to go through authorization, since I already have a token, which means that the option indicating AccessToken in authorization is also not suitable in this case. I would like to specify it directly in Message.Send, or is there some other way ... So, how to implement this using VKNET?

That is, the essence of the question is that I want to send a message using VKNET without touching authorization at all. If using AccessToken in authorization I simply set an active token from which they will do something, but I do not authorize (so as not to be suspicious for VK), then tell me if it is so or not. It's just that I can have several tokens, and I would not want to constantly log in before each send