Query Date only from MongoDB using C#

I am trying to query a collection by date only to check if a corresponding record exist. I have tried a number of solution here and google searches but no success. How can i also save date and time to local time.

Sample Collection

{
    "_id" : ObjectId("5a4f8026762caf03f0a22114"),
    "AttnDate" : ISODate("2018-01-04T20:00:00.000Z"),
    "AllAttendances" : [ 
        {
            "FullName" : "MYDOMAIN\\Michelle",
            "Logged" : ISODate("2018-01-05T13:39:35.338Z"),
            "IdleTime" : 17
        }
    ]
}

Attendance Class

public class Attendance
    {
        [JsonConverter(typeof(ObjectIdConverter))]
        public ObjectId Id { get; set; }
        [BsonDateTimeOptions(Kind = DateTimeKind.Local)]
        public DateTime AttnDate { get; set; }
        public IEnumerable<TimeRecord> AllAttendances { get; set; }
    }

The Query method

public Attendance FindAttendanceByDate(DateTime CurrentDate)
        {
            var filter = Builders<Attendance>.Filter.Eq(x => x.AttnDate, CurrentDate);
            return context.Attendances.Find(filter).FirstOrDefault();
        }

How i am passing the CurrentDate on the above method

_AttendancesRepositories.FindAttendanceByDate(DateTime.Today);

Solution

In my case, i had to disable "Set time automatically" and "Set time zone automatically" in windows setting to get this to work. I dont know why. I may help someone to save 12 hours of their life.