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

//////////// Setting inside web.config file

<system.web.extensions>

    <scripting>

      <webServices>

        <jsonSerialization maxJsonLength="999999999"/>

      </webServices>

    </scripting>

  </system.web.extensions>