<div>
And?<br />
<br />
Are you running a 64Bit app and referencing 32Bit Oracle drivers?<br />
or<br />
32Bit app trying to reference 64Bit Oracle drivers?<br />
<br />
The Bit versions of the applications need to match up.
</div>


And?

Are you running a 64Bit app and referencing 32Bit Oracle drivers?
or
32Bit app trying to reference 64Bit Oracle drivers?

The Bit versions of the applications need to match up.

<div>
64bit oracle client with 32 bit visual studio on windows 2008 r2 server
</div>


64bit oracle client with 32 bit visual studio on windows 2008 r2 server

<div>
<div class="content wysiwyg-content">
when trying to connect oracle database from visual studio , it got error &quot;&nbsp;Attempt to load Oracle client libraries threw BadImageFormatException. This problem will occur when running in 64 bit mode with the 32 bit Oracle client components installed.&quot;
</div>
</div>


when trying to connect oracle database from visual studio , it got error " Attempt to load Oracle client libraries threw BadImageFormatException. This problem will occur when running in 64 bit mode with the 32 bit Oracle client components installed."

oracle error

Oracle is an object-relational database management system. It supports a large number of languages and application development frameworks. Its primary languages are SQL, PL/SQL and Java, but it also includes support for C and C++. Oracle also has its own enterprise modules and application server software.

Oracle Database

Visual Basic .NET (VB.NET) is an object-oriented programming language implemented on the .NET framework, but also supported on other platforms such as Mono and Silverlight. Microsoft launched VB.NET as the successor to the Visual Basic language. Though it is similar in syntax to  Visual Basic pre-2002, it is not the same technology,

Visual Basic.NET

The Microsoft Legacy Operating System topic includes legacy versions of Microsoft operating systems prior to Windows 2000: All versions of MS-DOS and other versions developed for specific manufacturers and Windows 3/3.1, Windows 95 and Windows 98, plus any other Windows-related versions, and Windows Mobile.