private void MutiSignByPlatform(string documentId)
{
PlatformMutiSignRequest mutiSignRequest = new PlatformMutiSignRequest();
List <RemoteStamper> remoteStampers = new List <RemoteStamper>();
RemoteStamper stamper1 = new RemoteStamper();
stamper1.documentId = 2560294199182234262;
stamper1.sealType = RemoteSealType.SEAL;
stamper1.sealId = 2553205357123998650;
stamper1.offsetX = 0.1;
stamper1.offsetY = 0.2;
stamper1.page = 1;
remoteStampers.Add(stamper1);
RemoteStamper stamper2 = new RemoteStamper();
stamper2.documentId = 2560294199182234262;
stamper2.sealType = RemoteSealType.TIMESTAMP;
stamper2.offsetX = 0.5;
stamper2.offsetY = 0.6;
stamper2.page = 1;
remoteStampers.Add(stamper2);
RemoteStamper stamper3 = new RemoteStamper();
stamper3.documentId = 2560294199182234262;
stamper3.sealType = RemoteSealType.ACROSS_PAGE;
stamper3.sealId = 2553205357123998650;
stamper3.offsetY = 0.2;
remoteStampers.Add(stamper3);
mutiSignRequest.stampers = remoteStampers;
signService.MutiSign(mutiSignRequest);
}