Calculate your age using dateTimePicker :

Just consider this window :
Now double click on OK button and write down this code :
 private void okButton_Click_1(object sender, EventArgs e)
int myAge = DateTime.Today.Year – dateTimePicker1.Value.Year;
textBox1.Text = myAge.ToString();
Now select a birthday date from dateTimePicker then click OK button.then we can see the result in text box.

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