Datetimeoffset not getting mapped in mongodb C# driver

See more:

C#

DateTime

MongoDB

serialization

I am saving a field value as DatetimeOffset in Mongodb via C# driver which is being saved in the db as

"createdAt" : [
           NumberLong(637166528776997165),
           NumberInt(0)
       ]

But when trying to get it back its not getting parsed/mapped.

When looked upon using result.ToJson() found out that its coming as

"createdAt" : [NumberLong(0), 0]

.

What I have tried:

Already tried

var serializer = new DateTimeSerializer(DateTimeKind.Utc, BsonType.Document);
          BsonSerializer.RegisterSerializer(typeof(DateTime), serializer);

          var sr = new DateTimeOffsetSerializer();
          BsonSerializer.RegisterSerializer(typeof(DateTimeOffset), sr);