Why can't a new value be assigned to a variable in a class?

Question

C++ / C#

Good afternoon! Faced with the fact that it is impossible to assign a new value to a variable directly in the class, and not in the method. Please tell me why...

Answer 1

You have already initialized the variable with a value once, outside the method, as far as I know, you cannot change the variable. In the body of the method, you can assign a new one. Not within the class.

Answer 2

Because code cannot be written inside a class outside of methods and initialization sections.

Answer 3

Because the syntax of the C# language does not allow it.