many unsuccessfull logins might create this...

Namespace: Google.GData.Client
Assembly: Google.GData.Client (in Google.GData.Client.dll)
Version: 1.4.0.2

Syntax

C#
[SerializableAttribute] public class CaptchaRequiredException : AuthenticationException

Visual Basic (Declaration)
<SerializableAttribute> _ Public Class CaptchaRequiredException _ Inherits AuthenticationException

Visual C++
[SerializableAttribute] public ref class CaptchaRequiredException : public AuthenticationException

Inheritance Hierarchy