If your codebase relies heavily on 11g-specific structural types or features deprecated in newer managed drivers, keeping Oracle.DataAccess.dll 4.112.3.0 properly installed via the ODAC XCopy distribution remains your most stable execution path.
If you are building a new application today, avoid using this version. Instead, use the latest from NuGet. However, if you are maintaining an existing system—or deploying a legacy ERP—this guide gives you everything you need to successfully acquire, install, and resolve errors related to Oracle.DataAccess.dll 4.112.3.0 .
The best and most reliable way to obtain this version is by installing the corresponding Oracle Data Access Components (ODAC) package from Oracle. 1. Download ODAC 11.2.0.3
To obtain the official, authenticated assembly, use one of the following legitimate options: Option 1: The Oracle Technology Network (OTN) Archive oracle.dataaccess.dll version 4.112.3.0 download
is part of the Oracle 11g Release 2 (11.2.0.3) client set. While Oracle has released newer versions (12c, 19c, 21c, 23c), many enterprise applications developed between 2011 and 2015 still rely on this specific 11g client for stability or compatibility reasons. Why Choose Version 4.112.3.0?
Right-click on in your Project Solution Explorer. Click Add Reference .
Specifically 32-bit (x86) . If you need a 64-bit version, you must typically look for the newer 11.2.0.4.0 release, as a dedicated 64-bit installer for 11.2.0.3.0 is not standard. If your codebase relies heavily on 11g-specific structural
Because this specific version ( 4.112.3.0 ) belongs to the Oracle 11g Release 2 (11.2.0.3 or 11.2.0.4) era, it is considered an archive version.
It can be cleanly pulled directly into projects via .
Oracle no longer provides Critical Patch Updates (CPUs) for this version. If this driver is used in a production environment handling sensitive data, it is highly recommended to plan a migration to: However, if you are maintaining an existing system—or
The installation will register Oracle.DataAccess.dll in the , typically located at: C:\Windows\Microsoft.NET\assembly\GAC_64\Oracle.DataAccess (for 64-bit) C:\Windows\Microsoft.NET\assembly\GAC_32\Oracle.DataAccess (for 32-bit) 3. NuGet Option
is the core component of Oracle Data Provider for .NET (ODP.NET), Managed Driver. It acts as the bridge between your .NET application (written in C# or VB.NET) and the Oracle database.
: This version is an unmanaged driver. Unlike the modern "Managed Driver" (Oracle.ManagedDataAccess.dll), this version requires a full Oracle Client or Instant Client installation on the machine to function. It relies on underlying C++ libraries (OCI). Compatibility :
Alternative: . Unlike managed drivers, the unmanaged Oracle.DataAccess.dll 4.112.3.0 is not on NuGet because it depends on Oracle Client registry and environment settings.
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