Check the compilation target of your project (Properties > Build > Platform Target). Match your application target ( x86 or x64 ) with the corresponding bitness of the Oracle DLL. OracleInternal.Network.NetworkException
2. "The provider is not compatible with the version of Oracle client"
string connString = "User Id=scott;Password=tiger;Data Source=ORCL;"; using (OracleConnection conn = new OracleConnection(connString))
The version numbering of Oracle.DataAccess.dll follows a strict structure tied directly to the Oracle client version: : Built for .NET Framework 4.0 or higher. 112 : Represents Oracle Database Client 11g Release 2. 3 : Represents the specific patchset level (11.2.0.3). 0 : The revision code. oracle.dataaccess.dll version 4.112.3.0 download
Oracle.DataAccess.dll (ODAC) is a .NET data provider that enables .NET applications to connect to Oracle databases. It provides a set of classes that implement the ADO.NET interface, allowing developers to interact with Oracle databases using .NET languages such as C# and Visual Basic .NET. The Oracle.DataAccess.dll assembly is a key component of the Oracle Data Access Components (ODAC) for .NET.
Check your Visual Studio project target platform. If it is set to x86 , you must install and reference the 32-bit version of the DLL. If running under IIS, ensure the Application Pool’s Enable 32-Bit Applications setting matches your DLL bitness.
A community-maintained version is available at NuGet - Oracle.DataAccess.x86.4 (Version 4.112.3). This is often easier for development environments that don't need a full client installation. Core Report Details Assembly Name: Oracle.DataAccess.dll Version: 4.112.3.0 (indicates .NET 4 compatibility). Bundle: Included in the ODAC 11.2.0.3.0 bundle. Check the compilation target of your project (Properties
: If you don't want a full install, download the Instant Client with SDK for 11.2.0.3, which includes the necessary OCI files to support the DLL. Common Issues & Fixes
It does not require a full Oracle Client installation.
: Supports connections to Oracle 9iR2 through Oracle 11gR2 (and generally 12c). "The provider is not compatible with the version
Explicitly split into 32-bit (x86) and 64-bit (x64) versions. They cannot be interchanged.
The is a critical component of the Oracle Data Provider for .NET (ODP.NET), specifically associated with the Oracle 11g Release 2 (11.2.0.3) client stack. This version serves as the bridge between .NET applications and the Oracle Database. Technical Profile Version : 4.112.3.0 Runtime : .NET Framework 4.0 (and later)
Is your application compiled as or 64-bit (x64) ? Are you using a web server like IIS?