How to forbid calling a method C#

I want to allow calling the method only from the particular methods. Take a look at the code below.

  private static void TargetMethod()
  {
  }

  private static void ForbiddenMethod()
  {
     TargetMethod();
  }

  private static void AllowedMethod()
  {
     TargetMethod();
  }

I need only AllowedMethod could call TargetMethod. How to do it using classes from System.Security.Permissions?

Updated: Thanks for your answers, but I don't want to debate about design of my application. I just want to know is it possible to do it using .net security or not?