这取决于您希望它在电线上的外观。如果您希望它的长度是 （进入时代），则：做到这一点。例如：

It depends on what you want it to look like on the wire. If you want it to be a long (delta into epoch), then : do that. For example:

[ProtoMember(...)] public long Foo {get;set;}

如果您希望它是长的电线，而 DateTime 在您的代码中：这样做：

If you want it to be a long on the wire and a DateTime in your code: do that:

 public DateTime Foo {get;set;}
 [ProtoMember(...)] private long FooSerialized {
    get { return DateTimeToLong(Foo); }
    set { Foo = LongToDateTime(value); }
  }

如果您不在乎，只想存储 DateTime ，这样做：

If you don't care and just want to store a DateTime, do that:

[ProtoMember(...)] public DateTime Foo {get;set;}