Checks the Windows Registry for details relating to "Microsoft.ACE.OLEDB" and "Microsoft.Jet.OLEDB"

ListOleDb.cs

using System;
using Microsoft.Win32;

public class Program
{
  public static void Main()
  {
    const string searchKey1 = "Microsoft.ACE.OLEDB";
    const string searchKey2 = "Microsoft.Jet.OLEDB";

    using (RegistryKey baseKey = Registry.ClassesRoot)
    {
        foreach (string keyName in baseKey.GetSubKeyNames())
        {
            if (keyName.StartsWith(searchKey1, StringComparison.OrdinalIgnoreCase) ||
                keyName.StartsWith(searchKey2, StringComparison.OrdinalIgnoreCase))
            {
                Console.WriteLine($"{keyName}");
                string clsid = GetClsid(baseKey, keyName);
                if (!string.IsNullOrEmpty(clsid))
                {
                    CheckRegistryPathsForClsid(clsid);
                }
                else
                {
                    Console.WriteLine("  No CLSID value found for " + keyName);
                }
            }
        }
    }
  }

  private static string GetClsid(RegistryKey baseKey, string keyName)
  {
      using (RegistryKey clsidKey = baseKey.OpenSubKey(keyName + @"\CLSID"))
      {
          if (clsidKey != null)
          {
              return (string)clsidKey.GetValue("");
          }
          return null;
      }
  }

  private static void CheckRegistryPathsForClsid(string clsid)
  {
    string[] registryPaths =
    {
      @"WOW6432Node\CLSID\",
      @"CLSID\"
    };
    const string subKey = @"\InprocServer32";
    foreach (var registryPath in registryPaths)
    {
      string InprocKey = registryPath + clsid + subKey;
      using (RegistryKey key = Registry.ClassesRoot.OpenSubKey(InprocKey))
      {
        if (key != null)
        {
          string dllPath = (string)key.GetValue("");
          if (!string.IsNullOrEmpty(dllPath))
          {
            Console.WriteLine($"  HKEY_CLASSES_ROOT\\{InprocKey}");
            Console.WriteLine($"    \"{dllPath}\"");
          }
        }
      }
    }
  }
}