Age Calculation with nullable death date : nullable « Data Type « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. Data Type
3. nullable

using System;
using System.ComponentModel;

        class Person
        {
            DateTime birth;
            DateTime? death;
            string name;

            public TimeSpan Age{
                get{
                    if (death == null){
                        return DateTime.Now - birth;
                    }else{
                        return death.Value - birth;
                    }
                }
            }

            public Person(string name,DateTime birth,DateTime? death)
            {
                this.birth = birth;
                this.death = death;
                this.name = name;
            }

            public static void Main()
            {
                Person turing = new Person("A",new DateTime(1913, 2, 23),new DateTime(1954, 6, 7));
                Person knuth = new Person("D",new DateTime(1978, 1, 10),null);
            }
       }