Set Academic year from date picker to textbox

Question

Dear all genius kindly help me, I am beginner in C# windows application: In my current school project I want to set an academic year. From the datepicker start and end date of the academic year could be picked and in the textbox the starting year and the last two digit of the end year should be shown.

Below is the picture example:

 

 

 

 I had been looking all over google from past weeks but could not get any, please help me.

Thank you in advance.