GetPasswordBoxCaretPostion

PasswordBoxHelper.cs

private int GetPasswordBoxCaretPostion(PasswordBox passwordBox)
{
  var infos = passwordBox?.GetType()?.GetProperty("Selection", BindingFlags.NonPublic | BindingFlags.Instance);
  var selection = infos?.GetValue(passwordBox, null) as TextSelection;
  var tTextRange = selection?.GetType()?.GetInterfaces()?.Where(x => x.Name == "ITextRange")?.FirstOrDefault();
  var oStart = tTextRange?.GetProperty("Start")?.GetGetMethod()?.Invoke(selection, null);
  var value = oStart?.GetType()?.GetProperty("Offset", BindingFlags.NonPublic | BindingFlags.Instance)?.GetValue(oStart, null) as int?;
  var caretPosition = value.GetValueOrDefault(0);
  return caretPosition;
}