C#, how to Config a GPO?

Question

the code below successfully create a GPO, but it is useless because it need to be :

1) linked to an OU

2) configured by values

3) add security filtering

using Microsoft.GroupPolicy;

private void ManipulateGPO(){
    GPDomain domain = new GPDomain("sh.dom");
    Gpo gpo_background = domain.CreateGpo("testingGPO");
}

any help will be appreciated :(