How to encrypt the web config file?

Question

I have use command prompt command for encrypt the web config but its shows below error

'C:\Windows\Microsoft.NET\Framework\v2.0.50727' is not recognized as an internal or external command, operable program or batch file.

 

And i will change the framework path also

 

C:\Windows\Microsoft.NET\Framework\v3.5

C:\Windows\Microsoft.NET\Framework\v4.0.30319

 

I have used the below command

 

C:\Users\Administrator>C:\Windows\Microsoft.NET\Framework\v2.0.50727>ASPNET_REGIIS -pef "connectionStrings" "D:\Client_Live_04082017\Web" -prov "DataProtectionConfigurationProvider"