How to generate end date in datetime picker automatically

Question

Hai,

 

Here am using c# windows application , in this project I want to calculate the end date.

Here am using textbox for enter the total number of months and one datetimepicker for start date  after I fill these details the second datetime picker will show the exact date based on the textbox value and datetimepicker1.

 

How can I do this in my project.

 

For an example:

 

Textbox1: 11 ( manual entry)

 

DatetimePicker1: 16-11-2015(manual entry)

 

DatetimePicker2:16-10-2016 (system generate)

 

Please anybody help this question, it is urgent now .