401 Unauthorized when Requesting an Access Token

[Pav]

I do not have any .NET examples. But I am guessing the problem is how you are communicating in getting the token.

I posted something the other week in PHP which uses a Form (GET) to Authorize and cURL (POST) to get the tokens.

Cannot retrieve my Access Token

Okay, I experimented in what you are trying to do, but I was also getting the same failure when doing a Form POST as well. Using cURL I was able to get the Access / Refresh Tokens as normal. Here is a copy of the code I used. First part is the Authorization using a Form Element. Second part uses cURL to process the Access Code and get the Tokens. Once you have authorized, it will go back to the script, do the cURL and return the Tokens. Fill in the variables at the top for your application…

Hopefully that gives you some guidance.