C# Reading the registry: ProductID returns null in x86 targeted app. “Any CPU” works fine

Question

I have recently moved to a W7 64bit machine with VS 2010. My project is set to run on Any CPU. When I change this to be targeted at x86 I noticed s

Answer 1

This code will get the id for all kinds of os architectures and program architectures. Could be written shorter but I like the readability

    static string GetProductId()
    {
        RegistryKey localMachine = null;
        if (Environment.Is64BitOperatingSystem)
        {
            localMachine = RegistryKey.OpenBaseKey(Microsoft.Win32.RegistryHive.LocalMachine, RegistryView.Registry64);
        }
        else
        {
            localMachine = RegistryKey.OpenBaseKey(Microsoft.Win32.RegistryHive.LocalMachine, RegistryView.Registry32);
        }
        RegistryKey windowsNTKey = localMachine.OpenSubKey(@"Software\Microsoft\Windows NT\CurrentVersion");
        return windowsNTKey.GetValue("ProductId").ToString();
    }