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POpublic property vs static readonly
 

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    <p>I am trying to decide among three different implementations.</p> <p>I have an IPerson interface, all people types (ie. police officer, student, lawyer) implement this. Each person type needs to have a different AddressLocation (ie. home, office, mailing). This location never changes so it can be static/readonly. People are handled generically so my save method SavePerson(IPerson person) takes anything that inherits from the IPerson interface and I have a LoadPerson(int ID) method that takes an ID. </p> <p>My initial solution was to add a DefaultLocation property to IPerson and only have a getter. This way I can use generic methods to save the data. A problem arises when I try to load the data as I do not have an instance of the class yet so I can not reference the property.</p> <p>On the other hand I can create a public static readonly DefaultLocation property on each of my people types. In this case I can call Student.DefaultLocation and pass that into the method loading my data.</p> <p>Which way should I go and why? Both appear to have pros and cons.</p> <p>A third option came to me as I was typing this question: What if I used a public static readonly proprty which could be referenced without an instantiation of the class and then used a public property without a setter which could be called from the generic methods?</p> <p>Per Jon's advice I went with:</p> <pre><code>public interface IPerson { LocationType DefaultLocation { get; } } public class PoliceOfficer : IPerson { public static readonly LocationType _DefaultLocationType = LocationType.Office; public LocationType { get { return _DefaultLocationType; } } } </code></pre>
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