In VS2013 using Framework 4.5, I experienced what I consider to be unexpected behavior regarding the IsPostBack and PreviousPage settings when using server.transfer's from button clicks to traverse from page to page.
In a VS2013 scenario, the IsPostBack and PreviousPage settings worked the expected way ONLY on the first transfer to another page, but not for the next transfer.
When I recreate my test website of this condition FROM SCRATCH using VS2012 and the exact code shown below, the resulting website transfers correctly from page to page on the first and all subsequent clicks, properly setting the hidden fields, the IsPostBack and PreviousPage each time as expected.
Furthermore, when I run the website created in VS2013 in VS2012, it exhibits the same unexpected and undesired behavior.
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The following are components of my test website. I started a new ...

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