Page 22, adding the line:

The current date is @ViewBag.CurrentDate.ToLongDateString()

to Index.cshtml gives the error "Cannot perform runtime binding on a null reference" Of course there is no intellisense because ?? ViewBag is a dynamic variable which I don't quite understand.
Page 22, adding the line:

The current date is @ViewBag.CurrentDate.ToLongDateString()


to Index.cshtml gives the error

"Cannot perform runtime binding on a null reference"

Of course there is no intellisense because ?? ViewBag is a dynamic variable which I don't quite understand.

I'm trying to use the Amazon TagLookup Service detailed on page 367. I can't seem to find any good documentation from Amazon, does someone have pointers to docs?

I got my Access Key from amazon, but when I submit http://ecs.amazonaws.com/onca/xml?Service=AWSECommerceService&AWSAccessKeyId={MyAccessKey}&Operation=TagLookup&ResponseGroup=Tags,Small&Version=2007-07-16&TagName=asp.net&Count=20

I get the following response:

<?xml version="1.0" ?>
- <TagLookupErrorResponse xmlns="http://ecs.amazonaws.com/doc/2007-07-16/">
- <Error>
<Code>MissingParameter</Code>
<Message>The request must contain the parameter Signature.</Message>
</Error>
<RequestID>d5257695-2d9a-48cc-892f-32ff01daf0cd</RequestID>
</TagLookupErrorResponse>