There is a database of type MS Access (mdb), consisting of several tables. On framework 4.5, everything works when I translate to 4.0, then the connection is no longer created (an exception is raised on the connection.Open ();) line.
Maybe someone knows what could be the problem. It is necessary that everything works exactly on framework 4.0
This is what the exception (error) shows.
Check the application bit rate: x86, x64.
If x86, then change to X64 (or vice versa):
Project ---> Properties ---> Build ---> Target Framework ---> X64
Also see additionally here:
http://www.sql.ru/forum/984579/microsoft-jet-oledb-4-0-ne-zaregistrirovan
http://www.codeproject.com/Questions/464072/The-Microsoft-Jet-OLEDB-provider-is-not-regist
https://stackoverflow.com/questions/4289764/does-net-4-0-come-with-microsoft-jet-oledb-4-0
Source: https://ru.stackoverflow.com/questions/453983/
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