I\'ve recently made another question about connecting to MS-ACCESS database with .NET in C# or VB.NET. It worked just as intended with MDB, but with accdb it caused an excep
Use ACE 4 driver, download it here then use following connection string:
"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\marcelo.accdb;Jet OLEDB:Database Password=MyDbPassword;"