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Whenever a post back occurs, this hash code is recalculated and checked with the one that is stored in the __ViewState hidden field of the form. &nbsp;It they do not match, the page is rejected, thus ensuring that the ViewState is not tampered. <br />
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Is it the correct explaination
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Whenever a post back occurs, this hash code is recalculated and checked with the one that is stored in the __ViewState hidden field of the form.  It they do not match, the page is rejected, thus ensuring that the ViewState is not tampered. 


Is it the correct explaination

Viewstate tampering

The successor to Active Server Pages, ASP.NET websites utilize the .NET framework to produce dynamic, data and content-driven web applications and services. ASP.NET code can be written using any .NET supported language. As of 2009, ASP.NET can also apply the Model-View-Controller (MVC) pattern to web applications

ASP.NET

C# is an object-oriented programming language created in conjunction with Microsoft’s .NET framework. Compilation is usually done into the Microsoft Intermediate Language (MSIL), which is then JIT-compiled to native code (and cached) during execution in the Common Language Runtime (CLR).

The .NET Framework is not specific to any one programming language; rather, it includes a library of functions that allows developers to rapidly build applications. Several supported languages include C#, VB.NET, C++ or ASP.NET.