ADO.NET applications require MDAC 2.6 or later and the .NET Framework (315467)

The information in this article applies to:

Microsoft ADO.NET (included with the .NET Framework)
Microsoft ADO.Net 2.0

This article was previously published under Q315467

SYMPTOMS

When you try to open a connection in a deployed .NET application, you may encounter an exception similar to the following:

The .NET Data SQL Provider (System.Data.SqlClient) requires Microsoft Data Access Components (MDAC) version 2.6 or later.

CAUSE

This behavior occurs if MDAC version 2.6 or later is not installed on your computer. The Microsoft .NET Framework SDK and the .NET Framework redistributable package do not include the MDAC installation. All .NET applications that use data-access functionality require MDAC 2.6 or later (MDAC 2.7 is recommended).

Note Microsoft Visual Studio .NET installation includes MDAC 2.7 and Microsoft Visual Studio 2005 installation includes MDAC 2.8.

RESOLUTION

To resolve this issue, install MDAC 2.6 or later on your computer. To download the MDAC components, visit the following Microsoft Web site:

http://msdn.microsoft.com/dataaccess

STATUS

This behavior is by design.

MORE INFORMATION

Applications and controls written for the Microsoft .NET Framework require the .NET Framework to be installed on the computer on which the application or control runs. For more information about the .NET Framework, visit the following Microsoft Web site:

How to Get the Microsoft .NET Framework
http://msdn2.microsoft.com/en-us/netframework/default.aspx

REFERENCES

For more information, click the following article number to view the article in the Microsoft Knowledge Base:

320788 "How to install MDAC with a Windows Installer Merge Module" white paper is available

Modification Type:	Major	Last Reviewed:	10/17/2006
Keywords:	kberrmsg kbprb KB315467 kbAudDeveloper