Calling a Delphi method in a dll from c#

Question

I am trying to call a method in a Delphi DLL with the following signature:

 function SMap4Ovr(const OverFileName       : ShortString    ;
                            


        

Answer 1

Default calling convention in Delphi is register, not stdcall. It seems calling conventions details show us that Microsoft fastcall is not the same as Borland fastcall (register)

And C# string type differs from Delphi ShortString (it contains internally one byte length + string body)