MongoDB.Bson.Serialization.Serializers.EnumSerializer.Deserialize C# (CSharp) Метод

        public override object Deserialize(BsonReader bsonReader, Type nominalType, Type actualType, // ignored
            IBsonSerializationOptions options)
        {
            VerifyDeserializeType(nominalType);

            var bsonType = bsonReader.GetCurrentBsonType();
            switch (bsonType)
            {
                case BsonType.Int32: return Enum.ToObject(nominalType, bsonReader.ReadInt32());
                case BsonType.Int64: return Enum.ToObject(nominalType, bsonReader.ReadInt64());
                case BsonType.Double: return Enum.ToObject(nominalType, (long)bsonReader.ReadDouble());
                case BsonType.String: return Enum.Parse(nominalType, bsonReader.ReadString());
                default:
                    var message = string.Format("Cannot deserialize {0} from BsonType {1}.", nominalType.FullName, bsonType);
                    throw new Exception(message);
            }
        }