using (var svc = new LoyaltyService.LoyaltyClient())
{
  var request = new LoyaltyService.ManagementGroupRequestOfTransferCardMember();
  request.Token = "Token";
  request.ManagementGroup = "Management group";
  var transferCardMember = new LoyaltyService.TransferCardMember();
  transferCardMember.TargetMember_RSN = new Guid("d5d91645-e08b-4d72-b152-657470b4fef9");;
  transferCardMember.CardNumber = "Card number";
  transferCardMember.CardMergeSourceMember_TemplateID = "CARDMERGE_SOURCE_MEMBER";
  transferCardMember.CardMergeTargetMember_TemplateID = "CARDMERGE_TARGET_MEMBER";
  
  request.Value = transferCardMember;
  LoyaltyService.Result result = svc.TransferCardToMember(request);
  if (result.FaultCode == 0)
  {
    
  }
  else
  {
    
    throw new Exception(result.FaultDescription);
  }
}