Created Unassigned: problems while trying to reply the "Hello, R world example" [131]

Hi
My first task using R.NET, was trying to reply the "Hello, R world example" (https://rdotnet.codeplex.com/documentation), however after type REngine. the method SetEnvironmentVariables is not available, in other words it does not exist, obviously if the method does not exist I cant compile and run my program. My questions are
1. What is the purpose of the method SetEnviromentVariables?
2. Why it does not appear as a part of the class REngine (see the pic attached)?


regards,

Javier