How to generate and validate a software license key?

[umesh kumar]

http://www.codeproject.com/Articles/398130/Software-Copy-Protection-for-Net-Applications-a-Tu

http://www.codeproject.com/Articles/42167/Copy-Protection-for-Windows-Applications

https://msdn.microsoft.com/en-us/library/aa479017.aspx#aspnetcontrollicensing_topic1

http://forums.asp.net/t/1887824.aspx?How+to+generate+License+Key+in+Web+Application+

http://www.codeproject.com/Articles/11012/License-Key-Generation

https://social.msdn.microsoft.com/Forums/vstudio/en-US/2bb84351-277c-4b98-b10d-ca15abca75cd/how-to-set-license-keys-for-my-application

http://forums.asp.net/post/1781560.aspx