ViewState is enabled by default in ASP.NET projects. If you’re not going to use it, you can disable it site-wide in web.config.

To do this, enter the following into your web.config file:

<pages enableViewState=”false”>

</pages>

If you already have a <pages> tag,  just add enableViewState to the end like this:

<pages validateRequest=”false” enableViewState=”false”>

</pages>