Encrypted application configuration file - ASP.NET Security

Q.  If you must use a user name and password to connect to a database, where should you store the sensitive information?
- Published on 31 Aug 15

a. Compiled in the application
b. In an encrypted application configuration file
c. In a resource file deployed with the application
d. In the registry

ANSWER: In an encrypted application configuration file
 
If your connection string contains sensitive information then encrypted application configuration file by using RsaProtectedConfigurationProvider:

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