How to check if a DLL file is registered?

Question

How do I find whether a DLL file written in C# is registered or not programmatically?

I already tried this code, but it doesn\'t come off.

If I register a DL

Answer 1

If you know the CLSID of the COM dll, you can just check if there's a key with that CLSID on HKEY_CLASSES_ROOT\CLSID\{CLSID-of-your-COM-component} or HKEY_CLASSES_ROOT\Wow6432Node\CLSID\{CLSID-of-your-COM-component} (Wow6432Node => 32-bit COM registered on a 64-bit machine)

Here is an example:

private bool IsAlreadyRegistered()
{
    using (var classesRootKey = Microsoft.Win32.RegistryKey.OpenBaseKey(
           Microsoft.Win32.RegistryHive.ClassesRoot, Microsoft.Win32.RegistryView.Default))
    {
        const string clsid = "{12345678-9012-3456-7890-123456789012}";

        var clsIdKey = classesRootKey.OpenSubKey(@"Wow6432Node\CLSID\" + clsid) ??
                        classesRootKey.OpenSubKey(@"CLSID\" + clsid);

        if (clsIdKey != null)
        {
            clsIdKey.Dispose();
            return true;
        }

        return false;
    }
}