x64 view from x86:

using Microsoft.Win32;
using(var registryKey =
    RegistryKey.OpenBaseKey(
        RegistryHive.LocalMachine,
        RegistryView.Registry64
    ).OpenSubKey(@"Software\Microsoft\InetStp\Components"))
{
    var value = registryKey.GetValue(@"WMICompatibility");
}

x86 view from x64:

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft