C# integration with COM component in Delphi

Hello, I trying to write a software in C# that make calls in a .dll wrote in Delphi. Im trying to call this method (wrote in delphi): ------------- Function Recebe_Cartao (var Matriz : array [ 1..721 ] of char) : boolean ------------- In my C# code, I declare like this: --------------- [DllImport("[login to view URL]", CharSet = [login to view URL])] public static extern bool Recebe_Cartao( char[][] data); --------------- The problem is when I call in C# this method in my console application: ------------ Recebe_Cartao(RetornoMatriz); ------------- I get an error: Cannot marshal 'parameter #1': There is no marshaling support for nested arrays. I found a solution in: [login to view URL] but I still dont know how to fix my code. You can download my project in: [login to view URL] Main objective: I need loop through all values of RetornoMatriz array. Thanks Marcelo