How to hide the database connection string in the web.config

I would like to encrypt the database connection string so our developers do not know what the password is to connect to our production database.
We have 3 environments. Dev, test and Prod.  Dev and Test I have no issues with the Developer seeing the username and passwords unencrypted in the web.config file.  But when moving to the production environment I would like to hide this information from the developer.  Do I do the following?

run
C:\Windows\Microsoft.NET\Framework\v2.0.50727>aspnet_regiis.exe -pe "connectionStrings" -prov "DataProtectionConfigurationProvider" -app "/"
Encrypting configuration section...
Succeeded!

and then copy the resulting results to the web.config?  Or is their another solution?
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IandINSWAsked:
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käµfm³d 👽Commented:
I haven't confirmed the parameters of your command, but yes, you would use aspnet_regiis for this purpose.
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BuggyCoderCommented:
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