I don't see any other value other than 'Any CPU' in the drop down list in Properties -> Build -> Configuration -> Platform in Visual C# 2010 Express or in Visual Web Developer 2010 Express.
I just removed some 64-bit dlls and got their 32-bit versions and added a reference to them.
Since then, I've been receiving a BadImageFormatException.
I found a couple of suggestions elsewhere but they haven't worked for me so far.
I found this one to be the most useful of all.
For anyone who faces this same problem later, here's help. It says:
Express Editions:
The VB and C# Express products do not expose the
Target property inside the development environment.
You will need to carefully modify the project file
using a text or XML editor.
1. Close the project and/or solution
2. Select Open File from the File menu
3. Navigate to the project directory, and highlight
the project file
4. Press the Open button, the project file should open
in the XML editor
5. Locate the first <PropertyGroup> section and add
the following line:
<PlatformTarget>x86</PlatformTarget>
1. Save the project file
2. Reopen the project and/or solution using
Open Project/Solution from the File menu
3. Continue with development, debugging, and testing
Alternatively, if the application is targeted to 64-bit
platforms, you can ensure that the COM controls added to
the application have 64-bit equivalents on the development
and deployment computers.
JohnWein added the following:
Using the above method targets the x86 platform, but it
doesn't show the "Configuration:" and "Platform: " boxes
on the Properties tabs. To get this feature, I made a
template of one of the projects that shows these boxes.
Now I can target a platform and know what platform I
have targeted.