Hi Amiya,
The version 2.1.0.9 of syncfusion is quite old and several newer versions with many additional features have been released since then. Our last release was Essential Studio 4.4, which is available for download. Our next release version 5.0 is scheduled to be launched this month.
The version that you are using currently is not compatible with VS 2005. If you plan to work with VS 2005 (.NET 2.0) then, Essential Studio version 4.x is recommended. This version is fully compatible and has been tested with .NET 2.0. This also supports VS 2002 and VS 2003 frameworks.
Please refer the below link to download the latest version
http://www.syncfusion.com/downloads/latestversion/default.aspxLet us know if you need any further information.
Thanks for your interest in Syncfusion Products.
Regards,
Rajagopal