The line
BitsJob uploadBitsJob = manager.CreateJob(DisplayName, JobType.Upload);
can't access manager because it hasn't been set to anything yet - you could move the allocation into the constructor -
private readonly BitsManager manager;
private const string DisplayName = "Test Job";
BitsJob readonly uploadBitsJob;
public SyncHelper()
{
manager = new BitsManager();
uploadBitsJob = manager.CreateJob(DisplayName, JobType.Upload);
}