How to create C# list of ALL file associations(friendly application names & executables) for file type

I want to create a list/dictionary of all the friendly application names and their executable paths & commands for a specific file type. I've used AssocQueryString but it only returns one instance value.

For example:

The file type ".cs开发者_JAVA百科" on my PC has got many application associations for it when I right-click on a ".cs" file and select "Open With->" in the context menu, like "Microsoft Visual Studio 2008" & "Microsoft Visual Studio 2010" & "Notepad" & "Wordpad".

How can I enumerate all these values into a list in C#, obviously it must be extracted from the registry, but I'm very lost in all the "OpenWithList" and "OpenWithProgids" keys..

Thanks

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In HKEY_CLASSES_ROOT get the keys that start with "." Read their default value (REG_SZ) to get the name of the key to open next, Then to get the program location read in "key_name\shell\open\command" the default value

this gets you the default app associated with that file type.

It is similar with the OpenWithProgIds - each value name inside is the key name of the key you should get the path to

P.S. here is a code I just wrote, very messy, not safe and you'll have to clean up the call parameters to get the pure app location. This is just to get you started

        List<string> GetRegAssociatedFiles(string FileType)
    {
        List<string> _ret = new List<string>();

        Microsoft.Win32.RegistryKey _rk = Microsoft.Win32.Registry.ClassesRoot.OpenSubKey(FileType);
        string _defaultapp = _rk.GetValue("").ToString();

        Microsoft.Win32.RegistryKey _rkapp = Microsoft.Win32.Registry.ClassesRoot.OpenSubKey(_defaultapp + "\\shell\\open\\command");
        _ret.Add(_rkapp.GetValue("").ToString());
        _rkapp.Close();



        string[] _subkeys = _rk.GetSubKeyNames();
        for (int i = 0; i < _subkeys.Length; i++)
        {
            if (_subkeys[i] == "OpenWithProgIds")
            {
                Microsoft.Win32.RegistryKey _rkh = _rk.OpenSubKey(_subkeys[i]);
                string[] _names = _rkh.GetValueNames();
                for (int j = 0; j < _names.Length; j++)
                {
                    if (_names[j] == "")
                        continue;

                    Microsoft.Win32.RegistryKey _rhelp = Microsoft.Win32.Registry.ClassesRoot.OpenSubKey(_names[j] + "\\shell\\open\\command");
                    _ret.Add(_rhelp.GetValue("").ToString());
                    _rhelp.Close();
                }

            }
        }

        _rk.Close();

        return _ret;
    }