Hi,
"Indirect reference is being made to assembly system.web.extensions version 3.5.0.0, which
contains 'Telerik.web.UI.RadGrid'. This project reference a prior version of system.web.
extensions version 1.0.61025.0. to use 'Telerik.web.UI.RadGrid', you must replace the reference
to system.web.extensions with versionn 3.5.0.0 or higher"
Thanks.