How to get DateOfBirth using age in c#?

Question

I have user age, month and day something like 18 year 2 month and 5 days. I need to return user DateOfBirth using these params. How can I find user DateOfBirth from year, month and day?

Answer 1

I've found a solution and it's works for me.

 public static DateTime GetDateOfBirth(int year, int month, int day)
    {
        var today = DateTime.Today;
        int currentYear = today.Year;
        int currentDay = today.Day;
        int currentMonth = today.Month;

        if (day >= currentDay)
        {
            currentMonth--;
            currentDay += DateTime.DaysInMonth(currentYear, currentMonth);
        }

        if (month >= currentMonth)
        {
            currentMonth += 12;
            currentYear--;
        }

        return new DateTime(currentYear - year, currentMonth - month, currentDay - day);
    }