System.Text.RegularExpressions.RegexCompiler.Compile C# (CSharp) Method

        internal static RegexRunnerFactory Compile(RegexCode code, RegexOptions options) {
            RegexLWCGCompiler c = new RegexLWCGCompiler();
            RegexRunnerFactory factory;

            new ReflectionPermission(PermissionState.Unrestricted).Assert();
            try {
                factory = c.FactoryInstanceFromCode(code, options);
            }
            finally {
                CodeAccessPermission.RevertAssert();
            }
            return factory;
        }

        /// <summary>
        /// Main application entrypoint.
        /// Might make this have methods and be a class rathern the a program...
        /// Then the class can Serialise and Deserialiaze the Regexps
        /// </summary>
        /// <param name="arg">Command line arguments</param>
        static public void Main(String[] arg)
        {
            // Create a compiler object
            RegexCompiler r = new RegexCompiler();

            // Print usage if arguments are incorrect
            if (arg.Length <= 0 || arg.Length % 2 != 0)
            {
                Debug.Print("Usage: recompile <patternname> <pattern>");
                return;
            }

            // Loop through arguments, compiling each
            for (int i = 0, end = arg.Length; i < end; i += 2)
            {
                try
                {
                    // Compile regular expression
                    String name = arg[i];
                    String pattern = arg[i + 1];
                    String instructions = name + "Instructions";

                    // Output program as a nice, formatted char array
                    Debug.Print("\n    // Pre-compiled regular expression '" + pattern + "'\n"
                                     + "    private static  char[] " + instructions + " = \n    {");

                    // Compile program for pattern
                    RegexProgram program = r.Compile(pattern);

                    // Number of columns in output
                    int numColumns = 7;

                    // Loop through program
                    char[] p = program.Instructions;
                    for (int j = 0; j < p.Length; j++)
                    {
                        // End of column?
                        if ((j % numColumns) == 0) Debug.Print("\n        ");

                        // Print char as padded hex number                    
                        String hex = (0).ToHexString();
                        
                        while (hex.Length < 4) hex = "0" + hex;
                        
                        Debug.Print("0x" + hex + ", ");
                    }

                    // End of program block
                    Debug.Print("\n    };");
                    Debug.Print("\n    private static  REProgram " + name + " = new REProgram(" + instructions + ");");
                }
                catch (RegexpSyntaxException e)
                {
                    Debug.Print("Syntax error in expression \"" + arg[i] + "\": " + e.ToString());
                }
                catch (Exception e)
                {
                    Debug.Print("Unexpected exception: " + e.ToString());
                }
            }
        }