title: Set Null DateTime in InsertQuery
body: <p>I have a dataset and it has a InsertQuery(String Name,String Surname,DateTime BDate)</p>
  
  <p>Now I can wirte code like this, </p>
  
  <p><strong>_t.InsertQuer("Alper","AYDIN", null);</strong></p>
  
  <p>it can record data OK,</p>
  
  <p>But I want to do like this,</p>
  
  <p><strong>_t.InsertQuery("Alper","AYDIN", dtBDate.IsEmpty==true?null:dtBDate.Value);</strong></p>
  
  <p>But when I Depoly it is give error like this; </p>
  
  <p>Type of conditional expression cannot be determined because there is no implicit conversion between '' and 'System.DateTime' </p>
  
  <p>How Can I set null ?</p>