Date time picker validations

Question

I am sorry for posting this question as it may be find silly to all, but I am not getting the exact solution.

The question is: I have a Date time picker in my proje

Answer 1

if (string.IsNullOrEmpty(dateInsert.Text)
          {
            MessageBox.Show("Please select date!");
            dateInsert.Focus();
            return;
           }

hope this helps someone