browsing internet i found this document about ado.net entity framework which comes with microsoft .net framework 3.5 sp1.

check it out at:

(reference http://cid-245ed00edb4c374e.skydrive.live.com/self.aspx/Public/entity%20framework%20learning%20guide.pdf)

Hi,

if you have been working with Windows communication foundation and you still don’t know how to organize your layers in a very good way, you have to check this out. in this video of DNRTV Miguel Castro shows us how to get the best out of Windows Communication Foundation. Miguel extholls the virtues of doing WCF projects from scratch, and not using the Visual Studio templates.  you can get/watch the video from the following link

http://www.dnrtv.com/default.aspx?showNum=122

Want to learn LINQ? looking for a lightweigh and fast application to evaluate your linq expression? now check this out. i found a very good free application which lets you interactively query SQL databases in a modern query language: LINQ. LINQPad is also a great way to learn LINQ: it comes preloaded with 200 examples from the book, C# 3.0 in a Nutshell.  And finally LINQPad is more than just a LINQ tool: it's a code snippet IDE that instantly executes any C#/VB.net expression, statement block or program. Put an end to those hundreds of Visual Studio Console projects cluttering your source folder! you can get it from here.

if you want to develop and ECommerce application in .net, you should definitely check the post regarding a real eCommerce article. For sure it will help a lot.

one issue we usually face while developing an ECommerce application is testing credit card  payment system. so here is list of credit card numbers we can use to test payment system.

American Express: 3111-1111-1111-1117

Visa: 4111-1111-1111-1111 or 4222-2222-2222-2222

MasterCard: 5111-1111-1111-1118 

Discover: 6111-1111-1111-1116

remember that  CCV number and Name does not matter but you should keep the amount bellow $500 dollars and also make sure expiration date is not today but in the future.

Example:

Visa:4222-2222-2222-2222

CCV:123

Name: Vahid Taslimi

Expiration Date: 0110

Amount: $486.65

Hope this helps.

i just found a set of java and eclips learning videos. these are good mostely for begginers.

you can find them here

http://sourceforge.net/project/showfiles.php?group_id=200662