title: Date in textbox in dd/mm/yyyy format
body: <p>I am a beginner with C# and am having some problems with DateTime.
  I do not want to use 3 separate dropdowns or textboxes for date. But I still want to be able to put restrict the user input to the format of the date (dd/mm/yyyy). How can I do that?</p>
  
  <p>Note: I am just a learner so please explain whatever code you write</p>