How to calculate age in years from dob in c# [duplicate]

Question

   private void button1_Click(object sender, EventArgs e)
    {
        DateTime dob = new DateTime();
        textBox1.Text = dob.ToString();
        int age;
        age = Convert.ToInt32(textbox2.Text);
        age = DateTime.Now.Year - dob.Year;
        if (DateTime.Now.DayOfYear < dob.DayOfYear)
            age = age - 1;

    }

How to claculate the age from dob.This is my form1.cs.any ideas please

Answer 1

DateTime today = DateTime.Today;

int age = today.Year - bday.Year;

if (bday > today.AddYears(-age))
 age--;