Refactored console printing code
Individial Group and Category stores
Merge pull request #4 from Ibrahim-Islam/master

Individial Group and Category stores
without linq/lamda expression

since we assume no one knows LINQ (Lamda expression also), so I am making it undo.
removing linq code
Added dummy data for all lists
Merge pull request #5 from Ibrahim-Islam/master

Added dummy data for all lists.
Thanks.
Refactored to initialize Group and Categories data in constructor
Merge pull request #6 from Ibrahim-Islam/master

Refactored to initialize Group and Categories data in constructor
first class practice commit
Merge pull request #7 from foyzul/master

Merge pull request #2 from foyzulkarim/master
Merge pull request #3 from foyzulkarim/master

test