Set expiry date of software

You can do a code like

1) You have to create a database and add StartDate, EndDate with other details like client id , client name etc.

Write logic on Login button click event.

Get endDate from database & take year from that and then comapre current year with endDateYear.

Example:

var endYear = // get end year from database by using connection string - suppose u get value 2019
var currentYear = DateTime.Now.Year;
if(endYear == currentYear)
{
// write your logic
}
else
{
// Show a messagebox to contact ur admin here
}

2) Also you can do hard code directly if you do not want to use any database connectivity etc.

All the best.
Let me know if any concern.

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