/// <summary>
/// returns a recursive sequence of the sub keys of a registry key.
/// </summary>
/// <param name="ScopeKeyPath"></param>
/// <returns></returns>
public static IEnumerable <string> RegistryKeysDeep(string ScopeKeyPath)
{
var regKey = RegistryKeyExt.OpenRegistryKey(ScopeKeyPath);
if (regKey == null)
{
yield break;
}
else
{
foreach (var subKeyName in regKey.GetSubKeyNames())
{
// first, return the sub key.
var subKeyPath = RegistryKeyExt.Combine(regKey.Name, subKeyName);
yield return(subKeyPath);
// next, return the sub keys of the sub key.
foreach (var keyPath in RegistryKeyExt.RegistryKeysDeep(subKeyPath))
{
yield return(keyPath);
}
}
regKey.Close();
yield break;
}
}
/// <summary>
/// returns a sequence of registry key paths to file extensions in the registry.
/// </summary>
/// <returns></returns>
public static IEnumerable <string> FileExtensionRegistryKeys()
{
using (var cr =
RegistryKey.OpenBaseKey(RegistryHive.ClassesRoot, RegistryView.Default))
{
foreach (var keyName in cr.GetSubKeyNames())
{
if ((keyName.Length > 0) && (keyName[0] == '.'))
{
var extPath = RegistryKeyExt.Combine(cr.Name, keyName);
yield return(extPath);
}
}
}
yield break;
}
public static RegistryKey OpenRegistryKey(string KeyPath)
{
RegistryKey subKey = null;
var rootName = RegistryKeyExt.GetRoot(KeyPath);
var subKeyPath = RegistryKeyExt.GetPathAfterRoot(KeyPath);
if (rootName.IsNullOrEmpty())
{
subKey = RegistryKeyExt.OpenBaseKey(KeyPath);
}
else
{
using (var bk = RegistryKeyExt.OpenBaseKey(rootName))
{
subKey = bk.OpenSubKey(subKeyPath);
}
}
return(subKey);
}