void ISerializer <TimeSpan> .Write(ref ProtoWriter.State state, TimeSpan value) => PrimaryTypeProvider.WriteDuration(ref state, value);
void ISerializer <DateTime> .Write(ref ProtoWriter.State state, DateTime value) => PrimaryTypeProvider.WriteTimestamp(ref state, value);
TimeSpan ISerializer <TimeSpan> .Read(ref ProtoReader.State state, TimeSpan value) => PrimaryTypeProvider.ReadDuration(ref state, value);
DateTime ISerializer <DateTime> .Read(ref ProtoReader.State state, DateTime value) => PrimaryTypeProvider.ReadTimestamp(ref state, value);