code: def generate_sample_cdk_cs_module(env_root, module_dir=None):
      
      if module_dir is None:
          module_dir = os.path.join(env_root, 'sampleapp.cdk')
      generate_sample_module(module_dir)
      for i in ['add-project.hook.d.ts', 'cdk.json', 'package.json',
                'runway.module.yml', 'README.md']:
          shutil.copyfile(
              os.path.join(ROOT,
                           'templates',
                           'cdk-csharp',
                           i),
              os.path.join(module_dir, i),
          )
      shutil.copyfile(
          os.path.join(ROOT,
                       'templates',
                       'cdk-csharp',
                       'dot_gitignore'),
          os.path.join(module_dir, '.gitignore'),
      )
      os.mkdir(os.path.join(module_dir, 'src'))
      shutil.copyfile(
          os.path.join(ROOT,
                       'templates',
                       'cdk-csharp',
                       'src',
                       'HelloCdk.sln'),
          os.path.join(module_dir, 'src', 'HelloCdk.sln'),
      )
      os.mkdir(os.path.join(module_dir, 'src', 'HelloCdk'))
      for i in ['HelloCdk.csproj', 'HelloConstruct.cs', 'HelloStack.cs',
                'Program.cs']:
          shutil.copyfile(
              os.path.join(ROOT,
                           'templates',
                           'cdk-csharp',
                           'src',
                           'HelloCdk',
                           i),
              os.path.join(module_dir, 'src', 'HelloCdk', i),
          )
      LOGGER.info("Sample C# CDK module created at %s", module_dir)
      LOGGER.info('To finish its setup, change to the %s directory and execute '
                  '"npm install" to generate its lockfile.', module_dir)
docs: Generate skeleton CDK C# sample module.