In the Rooms class library project, create both a pure interface IClassroomManager and a class ClassroomManager that implements the interface. The class $($and therefore the interface$)$ capture the responsibilities of maintaining$/$recording$/$storing classroom records. The sub$-$points b to f below define the methods that need to be in the pure interface, and therefore in the class as well to implement that interface in c#$(22$ marks$)$ Develop code to complete the existing Windows Form, i$.$e$.$ MainForm, that allows users to

add new and update existing Classroom objects, validating all user input, and has the ability to show all

classrooms, or possibly filtering down by campus and$/$or capacity.

a$.$ The obvious way to store users would be for your MainForm object to have a

IClassroomManager object $($whose class is defined in the Rooms class library so you will need a

project reference to it$)$ as a private data field.

i$.$ That is$,$ an object that is responsible for storing and retrieving Classroom objects and

encapsulates all the file $\frac{\text{I}}{O}$ details.

ii$.$ And while it is important that your Form object maintains a preference to the

IClassroomManager interface, the actual instance will of course be an instance of the

ClassroomManager class.

b$.$ See the screenshot below for how your Form will look but basically it has $6$ input fields $($one for

each property above $-$ so $4$ textboxes and $2$ checkboxes$),$ a label for info $($in blue$)$ or error $($in

red$)$ messages, a ListBox to display classroom records $($possibly constraining them by campus

and$/$or capacity$),$ and $5$ buttons, namely:

Just explain it to me in a short form, I am getting confused about it$.$ Its C# winforms