You could also use an int parameter (called e.g. WhichFunction) which takes (e.g.) value 1 for function 1, 2 for function 2 and so on, and within your ForEach function you have a

  switch (WhichFunction)
  {
  case 1: function1(...);
      break;
  case 2: function2(...);
      break;
  //and so on
  }
  

MudGuard