.NET SOAP Web Service client and Borland SOAP server

If you have a SOAP server created with Borland Delphi and a SOAP client created with .NET, then you can't get it working out of the box. You'll get deserialization error on client side. Some changes are required in the SOAP server to make it compatible with the .NET client.

1. You need to go to the SOAP web module, select the HTTPSoapPascalInvoker, and make sure the option "soRootRefNodesToBody" is true.
2. If you have DateTime fields in your TRemotable objects, then you need to override the ObjectToSOAP function like this (because if you don't, then the deserializer will just skip the DateTime fields):

BillInfoType = class(TRemotable)

...

function BillInfoType.ObjectToSOAP(RootNode, ParentNode: IXMLNode; 
         const ObjConverter: IObjConverter; const Name, 
         URI: InvString; ObjConvOpts: TObjectConvertOptions; 
         out RefID: InvString): IXMLNode;
begin
  ObjConvOpts := ObjConvOpts + [ocoDontPrefixNode];
  result := inherited ObjectToSOAP(RootNode, ParentNode, ObjConverter, Name, URI, ObjConvOpts, RefID);
end;

Good luck!