Strategy Pattern in .NET: Listing 5

Person class after strategy pattern

Listing 5: Person.cs

using System;
using System.Collections.Generic;
namespace VSMStrategyPatternDemo
    public class Person
        public enum PersonType
        public string FirstName { get; set; }
        public string LastName { get; set; }
        public DateTime? DateOfBirth { get; set; }
        public int SSN { get; set; }
        public int EIN { get; set; }
        public PersonType Type { get; set; }
        private static Dictionary<PersonType, IPersonValidationStrategy> _validationStategies;
        public Person()
            _validationStategies = new Dictionary<PersonType, IPersonValidationStrategy>();
            _validationStategies.Add(PersonType.Employer, new EmployerValidationStrategy());
            _validationStategies.Add(PersonType.Employee, new EmployeeValidationStrategy());
            _validationStategies.Add(PersonType.Customer, new EmployeeValidationStrategy());
        public bool IsValid()
            return _validationStategies[Type].IsValid(this);

        public override string ToString()
            return String.Format("{0} {1} {2:M/d/yyyy}", FirstName, LastName, DateOfBirth);


About the Author

Eric Vogel is a Sr. Software Developer at Kunz, Leigh, & Associates in Okemos, MI. He is the president of the Greater Lansing User Group for .NET. Eric enjoys learning about software architecture and craftsmanship, and is always looking for ways to create more robust and testable applications. Contact him at