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# Unified API C# Programming Guides #
This section of the Enlightenment Wiki offers reference guides for the most commonly-used features of the Enlightenment Foundation Libraries (EFL) and associated infrastructure. These guides are designed to supplement and support the step-by-step tutorials, which are written as a starting point for beginners who have not previously programmed using EFL.
| WARNING | ||
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|  | Some C# classes are currently in BETA state<br>They should only be used for experimenting and NOT for any product development.<br>These classes are marked as BETA in the reference documentation.<br>The source code for the tutorials is subject to change in the future. |  |
NOTE:
The guides in this section use the latest beta release of the API, as noted in [Developing with the Enlightenment Foundation Libraries](/develop/start.md#Current_vs._Beta). Versions of these guides written for the current release can be found in the [Legacy section of the website](/develop/legacy/program_guide/start).
The guides in this section use the latest Unified API, as noted in [Developing with the Enlightenment Foundation Libraries](/develop/start.md#Legacy_vs_Unified_APIs). Versions of these guides written for the Legacy C API can be found in the [Legacy section of the website](/develop/legacy/tutorial/start).
If you haven't done so yet, read the [Setting Up a C# Development Environment](/develop/setup/csharp/) guide so you have a working EFL installation with C# support.
* [Main Loop Programming Guide](core/main-loop.md) * [Events Programming Guide](core/events.md) * [Eina Value Programming Guide](eina/generic-value.md) * [User Interface Sizing Programming Guide](ui/sizing.md) * [User Interface Focus Programming Guide](ui/focus.md)