Oracle.dataaccess.dll Version 4.112.3.0 Download Guide

Avoid these sources at all costs:

These sites often distribute:

Always prefer:
oracle.com, edelivery.oracle.com, or your company’s internal NuGet repository.

Oracle.DataAccess.dll is not open source. It is part of Oracle’s free-to-distribute ODAC components, but you must adhere to the Oracle Technology Network (OTN) License Agreement. You may: oracle.dataaccess.dll version 4.112.3.0 download

If you have landed on this page, you are likely a .NET developer or a database administrator working with Oracle databases. You have encountered the specific file Oracle.DataAccess.dll and need version 4.112.3.0. This file is a core component of Oracle’s ODP.NET (Oracle Data Provider for .NET) – the bridge that allows your .NET applications (ASP.NET, Windows Forms, WCF Services) to communicate with Oracle databases efficiently.

But unlike a simple ZIP file from a public repository, obtaining the correct version of this DLL requires understanding Oracle's distribution model, licensing, and dependencies. This article will provide a step-by-step guide on how to download, install, register, and troubleshoot Oracle.DataAccess.dll version 4.112.3.0.

Important Note: Oracle.DataAccess.dll version 4.112.3.0 is part of the ODAC (Oracle Data Access Components) 11.2 Release 4 (specifically 11.2.0.3.0). It is an older but still widely used version, especially in legacy enterprise applications. Avoid these sources at all costs:

Important: Oracle does not provide Oracle.DataAccess.dll as a standalone DLL download. You must obtain it through one of the following official channels:

| Application Type | Works? | Notes | |----------------|--------|-------| | .NET Framework 2.0/3.5 | Yes | Fully supported | | .NET Framework 4.0 – 4.8 | Yes | Requires <supportedRuntime> and possibly useLegacyV2RuntimeActivationPolicy | | .NET Core / .NET 5+ | No | This version is incompatible; use Oracle.ManagedDataAccess.Core | | 32-bit process with 64-bit DLL | No | Will throw BadImageFormatException | | ASP.NET (IIS) | Yes | Must enable 32-bit mode if using x86 version |

You cannot download Oracle.DataAccess.dll as a standalone file. It must be installed using Oracle’s installers. Below are the official methods. These sites often distribute:

Before spending hours hunting an outdated DLL, consider:

The unmanaged ODAC requires Oracle Client libraries. Ensure: