How Can I Calculate a Person's Age from Their Birthday Using DateTime?

Determine Age from Birthday Using DateTime

Many applications require calculating a person's age from their birthdate. Here's a concise and effective method using DateTime objects.

Method:

This approach offers a clean solution:

<code class="language-csharp">// Get today's date.
DateTime today = DateTime.Today;

// Calculate the age.
int age = today.Year - birthdate.Year;

// Adjust for cases where the birthday hasn't occurred yet this year.
if (birthdate.Date > today.AddYears(-age)) age--;</code>

This code efficiently calculates the age difference. It's important to remember that this calculation uses the Western age calculation method, not the East Asian system.

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