ASP.NET 4.5.2 and EnableViewStateMac

A few months ago, we posted that we were making changes to the way EnableViewStateMac behaves in ASP.NET. I’ll forego the typical blog post ceremony and cut right to the chase: Starting with ASP.NET 4.5.2, the runtime enforces EnableViewStateMac=true. If an application sets <%@ Page EnableViewStateMac="false" %> as a directive or <pages enableViewStateMac="false" /> as a config setting, the runtime ignores it and pretends that the developer had written "true" instead. Currently the .NET Framework 4.5.2 is an optional download on Microsoft Download Center. However, these changes will eventually be pushed out over Windows Update / Microsoft Update. Servers which have opted in to WU / MU servicing will...(read more)