Javascript Serialization Error

I'm save and restoring an object across postbacks using ViewState, like this:

So I save it using ViewState like this:

ViewState("MyObject") = object

and retrieve it like this:

Return ViewState("MyObject")

Since this is an object, I assume .NET is trying to serialize it.

I am getting a javascript serialization error.  See images.

I'm at a total loss.  Any ideas on this?
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HLRosenbergerAuthor Commented:
I found this article.  When I use Session to save/restore my object, all is OK. 

Could anyone expand on this?  I'm not an expert at serialization and I'm trying to understand.   I really want to use ViewState, not Session.   Can I serialize the object myself using BinaryFormatter and then save to ViewState?
RobOwner (Aidellio)Commented:
Are you sure you're storing the value correctly?  According to the docs ( you should use square brackets:

ViewState["MyObject"] = object

and retrieve it like this:

Return ViewState["MyObject"]

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HLRosenbergerAuthor Commented:
RobOwner (Aidellio)Commented:
Did you mean to give the B grade?
The grading system is a bit different here, have a look at this:
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