Can I return the contents of an enum as a list using an extension method?

Question

I have the following Enum:

public enum QuestionType {
    Check = 1,
    CheckAndCode = 2,
    na = 99
};

public static class QuestionTypeExtension
{
    public static string D2(this QuestionType key)
    {
        return ((int) key).ToString("D2");
    }
}

I already created an extension method that formats the output but now I have another requirement. What I need to do is to create an extension method that will return the contents of the enum into a list of the following class:

public class Reference {
   public string PartitionKey { get; set; } // set to "00"
   public int RowKey { get; set; } // set to the integer value
   public string Value { get; set; } // set to the text of the Enum
}

Is it possible to do this in an extension method?

Answer 1

Try the following:

public static List<Reference> GetReferencesForQuestionType()
{
    return Enum.GetValues(typeof(QuestionType))
        .Cast<QuestionType>()
        .Select(x => new Reference
                         {
                             PartitionKey = "00", 
                             RowKey = (int)x, 
                             Value = x.ToString()
                         })
        .ToList();
}

If you want to create an instance of the Reference -class for just one element in an extenstion method try this:

public static Reference ToReference(this QuestionType questionType)
{
    return new Reference
                     {
                         PartitionKey = "00", 
                         RowKey = (int)questionType, 
                         Value = questionType.ToString()
                     };
}    

Answer 2

How about...

public static class QuestionTypeExtension
{
    public static IEnumerable<Reference> Reference()
    {
        return Enum.GetValues(typeof(QuestionType)).OfType<QuestionType>().
            Select(qt=>new Reference(){ PartitionKey = "00", RowKey = (int)qt, Value = qt.ToString()});
    }
}