InvalidCastException for DeserializeDictionary when Key is of type Guid

Stack trace :

System.InvalidCastException: Invalid cast from 'System.String' to 'System.Guid'.
   at System.Convert.DefaultToType(IConvertible value, Type targetType, IFormatProvider provider)
   at LiteDB.BsonMapper.DeserializeDictionary(Type K, Type T, IDictionary dict, BsonDocument value)
   at LiteDB.BsonMapper.Deserialize(Type type, BsonValue value)
   at LiteDB.BsonMapper.DeserializeObject(Type type, Object obj, BsonDocument value)
   at LiteDB.BsonMapper.Deserialize(Type type, BsonValue value)
   at LiteDB.BsonMapper.ToObject[T](BsonDocument doc)
   at LiteDB.LiteCollection`1.<Find>d__17.MoveNext()

Data Type :

    public class QuizData
    {
        public QuizData()
        { }
        public string RollNumber { get; set; }
        public Dictionary<Guid,Choice> QuestionChoiceList { get; set; }
    }

Method Call :

_db.GetCollection<QuizData>("collectionName").FindAll();

I think it’s throwing because Generic conversion doesn’t support GUIDs. Platform : ASP.NET Core 1.1.0 on .NET Core 1.1.0 using .NET Core SDK 1.0.0-preview2-1-003177 Edit : I got it working by forking and using a very quick-and-dirty fix in DeserializeDictionary()

Guid temp;
var k = Guid.TryParse(key, out temp) ? 
temp : K.GetTypeInfo().IsEnum ? 
Enum.Parse(K, key) : Convert.ChangeType(key, K);

So basically right now you can’t have Guid as a TKey in an IDictionary

[PassiveModding]

Might be better to rename this issue to something like “InvalidCastException for DeserializeDictionary when Key is of non primitive or string type” Since it affects any non string/primitive key for a dictionary

[xied75]

Agree with @prajaybasu here, if some simple modification could expand the usability that would be worth it.

http://stackoverflow.com/questions/393731/generic-conversion-function-doesnt-seem-to-work-with-guids