Hello . What the meaning of (abstract) in c# ?

Answer 1

Abstract keyword in this context only makes sense when talking about classes. A class is abstract if it cannot be instantiated. This type of class cannot contain attributes(data), but it can contain methods(functions). They are mainly used as base classes for other classes. They are similar to interfaces, but has some different properties.

Answer 2

thanks

Answer 3

how i can use anonymos class or interface in abestract class?
ther is heap or stak?