Keeping ViewState in SessionPageStatePersister

Question

I want to keep viewstate of a specific page in session but following code block does not help me, what might I be missing?

So here is the code-behind file content of

Answer 1

The important part of the code is

protected override PageStatePersister PageStatePersister
{
    get
    {
        return new SessionPageStatePersister(this);
    }
}

This overrides the normal page state persister and provides one that persists the page data to the Session instead of the ViewState.