Hi Team,
I’m getting below error due to large file size of XML (RadTreeView source XML appox 6MB).

Error during serialization or deserialization using the JSON JavaScriptSerializer. The length of the string exceeds the value set on the maxJsonLength property.

In order to solution provided on http://www.telerik.com/help/aspnet-ajax/troubleshooting-treeview-maximum-length-exceeded.html

<system.web.extensions>

        <scripting>

            <webServices>

                <jsonSerialization maxJsonLength="999999999"/>

            </webServices>

            <scriptResourceHandler enableCompression="true" enableCaching="true"/>

        </scripting>

      </system.web.extensions>

I have applied above code in web.config But this does not work, 

I am using client side RadTreeView.

Please let me know the proper solution for the same.