Hi Nabia,
Thank you for your interest in Syncfusion Essential Studio.
Essential Studio v5.1.0.51 is the final stable version of Essential Studio that supports 1.1 .NET framework. The support for .NET 1.1 framework in Essential Studio starts from v3.2. Can you please let me know which version you are trying to work with?
I would like to recommend you to upgrade your framework and use the latest version of Essential Studio that comes with advanced features for the controls you specified. Please take a look into our latest product updates in the following location.
http://www.syncfusion.com/products/windows-forms/toolsPlease let me know if you have further questions. We are glad to assist you.
Regards,
Nanda
Syncfusion Software Pvt. Ltd.