title: DatePicker databinding sets default value to 1/1/0001 WPF c# for a Not-Nullable date
body: <p>This is an "extension" question to the 1/1/0001 question:
  <a href="https://stackoverflow.com/questions/11146977/datepicker-databinding-sets-default-value-to-1-1-0001-wpf-c-sharp">Original Question</a></p>
  
  <p>The original Q. Solution - 
  To set the DateTime field to be nullable (DateTime?) solves this problem.</p>
  
  <p>What is the solution  when the underlying field must be <strong>NOT NULL ?</strong> </p>
  
  <p>(In that case, the binding cause the DataGrid column Date Time Picker to set it's self to 01/01/0001)</p>
  
  <p>The Actual Entity in my case is generate by Entity Framework 6. </p>