what does . instance do in c# code example

Example 1: what does the modularity mean in c++

modularity means the written program can be splitted up in to modules by using classes and each class can be considered as a module.

Example 2: doest all the methos in interface need to implement c#

You have two choices:

- implement every method required by the interface
or
- declare the missing methods abstract in your class. This forces you
to declare your class abstract and, as a result, forces you to
subclass the class (and implement the missing methods) before you
can create any objects.