How can I call a C# program from Delphi and gather a return value?

Question

At the moment, both programs are still simple console applications. This will change later on, since this is only a test if it's even possible to call a C# program from Delphi.

Currently my delphi application looks like this:

program Project2;

{$APPTYPE CONSOLE}

{$R *.res}

uses
  System.SysUtils;

begin
  try
    // CALL C# PROGRAM
    // PRINT RETURN VALUE
  except
    on E: Exception do
      Writeln(E.ClassName, ': ', E.Message);
  end;
end.

And my C# program looks like this:

using System;

namespace Test
{
    class Program
    {
        static void Main()
        {
            // return hello world to the delphi program
        }
    }
}

My initial goal is call the C# application, return some value from C# to Delphi and then print the return value in Delphi.

I would highly appreciate any help! Thanks!