title: DateTimePicker BindingSource NULL if not manually changed
body: <p>I have a problem with DateTimePicker and bindingsource.</p>
  
  <p>When I add a new record without change Date from DateTimePicker the bindingsource set the date as null therefore problem occurs in my database</p>
  
  <p>The databinding code is:</p>
  
  <pre><code>this.dateDateTimePicker.DataBindings.Add(
      new System.Windows.Forms.Binding("Value", 
           this.storeBindingSource, 
           "date", 
           true));
  </code></pre>
  
  <p>If a choose a date from DateTimePicker all works fine!</p>
  
  <p>what is the problem and how could I fix it</p>