Database query: "Unauthorized"

[teodoro51m]

While the
var release = await client.GetReleaseAsync("2817604");
gives the correct result, the
var query = new SearchQuery();
query.Query = "Lovage";
query.Type = SearchItemType.Release;
var searchResults = await client.Search(accessToken.Key, accessToken.Secret, query);
gives
ErrorMessage: "You must authenticate to access this resource."
StatusCode: "Unauthorized"
I guess this is due to the fact that I don't know what to put in the useragent variable.
On the contrary, the query,
https://api.discogs.com/database/search?q=Lovage&key=my_consumerkey&secret=my_consumersecret
issued from a browser, works perfectly.
Please help. Thanks