Encrypt:
aspnet_regiis.exe -pef "appSettings" "D:\Sample\WebSite1" -prov "DataProtectionConfigurationProvider"
aspnet_regiis.exe -pef "connectionStrings" "D:\Sample\WebSite1" -prov "DataProtectionConfigurationProvider"
Decrypt:
aspnet_regiis.exe -pdf "appSettings" "D:\Sample\WebSite1"
aspnet_regiis.exe -pdf "connectionStrings" "D:\Sample\WebSite1"