title: DateTime format to a WPF TextBox
body: <p>I need some help. </p>
  
  <ol>
  <li><p>My problem is,I have a textbox,I wanna write a correct DateTime form for it with "autostring". For example if i write into my TextBox,I want the program to write a . or a / after year,month automatically (in US DateTime form after 2-2 strings,in Hungarian after 4-2 - I am from Hun). If you can only show me a form in other DateTime like the US-GB-GE or any other country,that won't be a problem at all.Hungarian DateTime would be only a formality in my program.</p></li>
  <li><p>I live in Hungary,didn't find any correct DateTime format for my Country. Format in here YYYY-MM-DD and not DD-MM-YYYY. Will it work if i simply reverse it or need to do anything else? I tried it,didn't seem to work,but maybe i did smth wrong.<br>
  Please help!</p></li>
  </ol>