Social Network

https://chatme.codeplex.com/
http://www.c-sharpcorner.com/UploadFile/rahul4_saxena/social-networking-website-in-Asp-Net-open-source-project/
https://sourceforge.net/projects/zakeerms/

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Hello  adevicmo,

Thank you for using our free Microsoft All-In-One Code Framework Sample Request Service!   

Your sample request is about how to develop the social network.  If I misunderstood your requirement, please feel free to let me know. 

There are some projects on Social Network. Here are two of the most closely. 
http://www.asp.net/web-pages/tutorials/social-networking/13-adding-social-networking-to-your-web-site
http://community.codeplex.com/
But they aren’t step by step.

We need to know what the basic functionality you want to achieve. 
If you can provide more information about the request, it will be helpful.
We’re waiting your response.

Please understand that the free Sample Request Service is not for urgent sample requests.   If your request is urgent, please use Microsoft Professional Advisory Services.

Thanks and have a great day!

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Feedback address: onecode@microsoft.com

try this: http://www.macoratti.net/10/05/RedeSocial.zip

here i make a example to ask your question, please vote my example, thank you so much.
http://code.msdn.microsoft.com/Social-Network-Example-in-64db2088

My project is going to make my group or community in a forum, that can post comments, can have a group chatting and register to join application.