可否设置时间跨度？到时间跨度

Question

我如何将此C＃代码行从Nullable TimeSpan转换为TimeSpan，因为DateStamp为Nullable DateTime

 TimeSpan? timestamp = DateTime.Now - modelXyz.DateStamp

Answer 1

TimeSpan? timestamp = DateTime.Now - modelXyz.DateStamp
if(timestamp.HasValue)
{
    TimeSpan nonNullableTS = timestamp.Value;
}