Oracle.DataAccess.dll is a critical component of the Oracle Data Provider for .NET (ODP.NET)
Alternatives to Maintaining Legacy Version 4.112.3.0
If you are not strictly bound to this exact version, consider upgrading:
The Oracle.DataAccess.dll version 4.112.3.0 is a core component of Oracle Data Provider for .NET (ODP.NET), specifically released with Oracle Data Access Components (ODAC) 11.2 Release 4. It is designed for applications targeting .NET Framework 4.0 and above that require communication with an Oracle Database. Key Specifications & Context
Official Oracle Download: Use the ODAC 11.2.0.3.0 Download & Install Instructions.