How to add a variable to all objects?

Question

C++ / C#

I'm making a 2d platformer with Unity2D. I need all objects to have a bool canwalk variable or the ability to set this variable in the script. How to do it?
I think that this is done through classes, but I did not understand them.

Answer 1

Well you are making a Walker class. Add it And then, all your classes inherit from Walker protected bool canWalk {get;set;}

Answer 2

Go through the basic training on the site so that such questions do not arise.