# kirupa.com - Introduction to OOP in C#: Classes - Page 1 **URL:** \ **Category:** programming\ **Created:** [October 14, 2021, 11:56am UTC](https://forum.kirupa.com/t/kirupa-com-introduction-to-oop-in-c-classes-page-1/649260 "2021-10-14T11:56:21Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![kirupa](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/kirupa/32/11616_2.png) [@kirupa](https://forum.kirupa.com/u/kirupa)\ **Post date:** [October 14, 2021, 11:56am UTC](https://forum.kirupa.com/t/kirupa-com-introduction-to-oop-in-c-classes-page-1/649260/1 "2021-10-14T11:56:21Z")
       by kirupa  |  5 January 2007 In the real world, you categorize and sub-categorize your environment based on the objects that can be found in it. For example, you have a chair which can be categorized as furniture. Your refrigerator can be categorized as an appliance. There are many such examples where a specific object is classified by a more general category.  * * * This is a companion discussion topic for the original entry at [https://www.kirupa.com/net/classes.htm](https://www.kirupa.com/net/classes.htm) ---
**Author:** ![kirupa](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/kirupa/32/11616_2.png) [@kirupa](https://forum.kirupa.com/u/kirupa)\ **Post date:** [October 16, 2021, 6:08am UTC](https://forum.kirupa.com/t/kirupa-com-introduction-to-oop-in-c-classes-page-1/649260/2 "2021-10-16T06:08:15Z")
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**Author:** ![kirupa](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/kirupa/32/11616_2.png) [@kirupa](https://forum.kirupa.com/u/kirupa)\ **Post date:** [October 16, 2021, 6:09am UTC](https://forum.kirupa.com/t/kirupa-com-introduction-to-oop-in-c-classes-page-1/649260/3 "2021-10-16T06:09:39Z")
It’s odd that nobody had hit this page since 2014 when the discourse-version of these forums went live. It’s also odd to see a “written by” date of 2007. Seems like a lifetime ago at this point 😛