JavaScriptSerializer

var PageCustomerOrder = new JavaScriptSerializer().Deserialize<PageCustomerOrder>(MainInfo);
var WMPageCustomerOrderDetail = new JavaScriptSerializer().Deserialize<List<PageCustomerOrderDetail>>(WMLines);
var BMPageCustomerOrderDetail = new JavaScriptSerializer().Deserialize<List<PageCustomerOrderDetail>>(BMLines);
 var DeletedOrderLines = new JavaScriptSerializer().Deserialize<string>(DeletedLines);
 var PageMoneyAttachment = new JavaScriptSerializer().Deserialize<List<PageMoneyAttachment>>(FileList);


 var allLines = BMPageCustomerOrderDetail;
allLines.AddRange(BMPageCustomerOrderDetail);