Ok, following the advice of Lex Li and I try to get Oid name using an other lib : #SnmpLib
Here the sample :
public static void Main(string[] args)
{
string oid = ".1.3.6.1.4.1";
IObjectRegistry registry = new ReloadableObjectRegistry(@"C:\Users\Fnizz\Desktop\MIBS_BARCO\");
IObjectTree tree = registry.Tree;
var o = tree.Search(ObjectIdentifier.Convert(oid));
string textual = o.AlternativeText;
Console.WriteLine(textual);
if (o.GetRemaining().Count == 0)
{
Console.WriteLine(o.Definition.Type.ToString());
}
Console.ReadKey();
}
But instead of to get the value .iso.org.dod.internet.private.enterprises
I get this one : .iso.3.6.1.4.1