private static IDictionary <Word, IList <ProblemMapping> > GetQuestionResults(IQuestion question, IEnumerable <ProblemMapping> problemMappings = null)
{
problemMappings = problemMappings ?? ProblemMapping.AllProblemMappings;
var wordToMapping = WordHelpers.AllWords()
.ToDictionary <Word, Word, IList <ProblemMapping> >(word => word, word => new List <ProblemMapping>());
foreach (var problemMapping in problemMappings)
{
var answers = question.GetPossibleAnswers(problemMapping).OrderBy(a => a);
foreach (var answer in answers)
{
wordToMapping[problemMapping.AnswerMapping[answer]].Add(problemMapping);
}
}
return(wordToMapping);
}