C# Winform Access Database Reading Data

I have a Winform with a Access Database, I have used it for a Year now when I delete all the Data and delete the auto number column and set it back to primary the new data will not show in the Datagridview. If I open the access file I see the data.

I can copy the old file back and it works as normal, I don't want to create a new Database just delete all the data and reset the autonumber.

Any suggestions?

Thanks

Booney440