PInvoke and C "char **"

Hi guys ... im working on a c# wrapper for a C dll ... i have a function that takes a "char **" :

void examplefunc( int argc, char ** argv );

so in C i would do :

char ** argv ;

argv = new char *[1];
argv[0] = new char[0xff];

strcpy( argv[0], "im some dummy text" );

examplefunc( 1, argv );


i would appreciate if someone could explain me how to do this in c# with pinvoke