How to create a deployment project compatible with both XP and Vista?

[Juliano.net]

My application uses the ADODB.DLL on Windows XP, but when using
Windows Vista, this DLL doesn't exist because it's called MSADO.DLL.

How can I have multiple assembly versions on the same installer so it
chooses the right version (depending on the OS version)?

Now I'm using this code (just a detail: I generated an interop for
msado.dll, called interop.adodb.dll)

peratingSystem os = System.Environment.OSVersion;

System.Reflection.Assembly ADODB_Assembly = null;

if ((os.Platform == PlatformID.Win32NT) && (os.Version.Major ==
6))
{
ADODB_Assembly =
System.Reflection.Assembly.Load("interop.adodb.dll ");
}
else
{
ADODB_Assembly = System.Reflection.Assembly.Load("adodb.dll");
}

Type type = ADODB_Assembly.GetType("ADODB.Connection");

Object conn = Convert.ChangeType(obj, type);

System.Reflection.PropertyInfo ProviderInfo =
type.GetProperty("Provider");
System.Reflection.PropertyInfo ConnectionStringInfo =
type.GetProperty("ConnectionString");

But I receive an exception telling that it's searching for these DLLs
on C:\Windows\System32 when it must be at the application directory.