void DeleteSubKeyTree(string subkey, bool throwOnMissingSubKey)
{
// Note: this is done by deleting sub-nodes recursively.
// The preformance is not very good. There may be a
// better way to implement this.
AssertKeyStillValid();
AssertKeyNameNotNull(subkey);
AssertKeyNameLength(subkey);
RegistryKey child = OpenSubKey(subkey, true);
if (child == null)
{
if (!throwOnMissingSubKey)
{
return;
}
throw new ArgumentException("Cannot delete a subkey tree"
+ " because the subkey does not exist.");
}
child.DeleteChildKeysAndValues();
child.Close();
DeleteSubKey(subkey, false);
}
/// <summary>
/// Utility method to delelte a key's sub keys and values.
/// This method removes a level of indirection when deleting
/// key node trees.
/// </summary>
private void DeleteChildKeysAndValues()
{
if (IsRoot)
{
return;
}
string[] subKeys = GetSubKeyNames();
foreach (string subKey in subKeys)
{
RegistryKey sub = OpenSubKey(subKey, true);
sub.DeleteChildKeysAndValues();
sub.Close();
DeleteSubKey(subKey, false);
}
string[] values = GetValueNames();
foreach (string value in values)
{
DeleteValue(value, false);
}
}
