How do I use OAuth to connect to the Etrade API?

Question

E-Trade released their API recently and provided technical documentation which is somewhat useful but not complete.

Does anyone have a fully working example in C#

Answer 1

Clear cookies and try again. I am not sure, why this happens. But, once you get this error, unless otherwise you clear the cookies, you will get the same error. I am able to login successfully and call some of the REST services.