Try out Nini, which is a 100% C# version (no DLL/PInvoke required). There's a NuGet package as well.
Example INI file:
[Cars]
model = Toyota
year = 2012
The C# code:
Nini.Ini.IniDocument doc = new Nini.Ini.IniDocument ("configuration.ini");
Console.WriteLine ("Model: " + doc.Get("Cars", "model"));
Console.WriteLine ("Year: " + doc.GetInt("Cars", "year"));