Internal Server Error response when using Anonymous calls on a public resource

[Kreth Faustino]

When the C# SDK is used to access a public resource without OAuth or Authentication (anonymous calls), the server returns an Internal Server Error (500).

[Gian Carlo Val Ebao]

fixed @ commit https://bitbucket.org/matchmove/api-vcard-sdk-csharp/commits/ba5a2a916f04249bedadfe5330b6322a9921bef0