Hi @Karkuvel Rajan Shanmugavel , Welcome to Microsoft Q&A,
The simpler approach is to create a compatibility item in the older .NET version to handle the conversion from BinaryFormatter to DataContractSerializer. Deserialize the BinaryFormatter data and reserialize it using DataContractSerializer. Then you can use the converted file in .NET 9.
Best Regards,
Jiale
If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.