old_contents: import os
  from .clr_executor import CLRExecutor
  from executors.utils import test_executor
  from judgeenv import env
  
  
  class Executor(CLRExecutor):
      extension = 'cs'
      compiler = 'csc'
  
  
  def initialize():
      if 'csc' not in env['runtime']:
          return False
      if not os.path.isfile(env['runtime']['csc']):
          return False
      return test_executor('CS', Executor, '''\
  using System;
  
  class test {
      public static void Main(string[] args) {
          Console.WriteLine("Hello, World!");
      }
  }''')
new_contents: import os
  from .clr_executor import CLRExecutor
  from executors.utils import test_executor
  from judgeenv import env
  
  
  class Executor(CLRExecutor):
      extension = 'cs'
      compiler = 'csc'
  
  
  def initialize(sandbox=True):
      # TODO: sandbox is ignored
      if 'csc' not in env['runtime']:
          return False
      if not os.path.isfile(env['runtime']['csc']):
          return False
      return test_executor('CS', Executor, '''\
  using System;
  
  class test {
      public static void Main(string[] args) {
          Console.WriteLine("Hello, World!");
      }
  }''')
  
subject: Update CS.py