code: def add_class_def(self, class_name, modifier="public"):
      class_def = f"{modifier} static class {class_name} {{"
      self.add_code_line(class_def)
      self.increase_indent()
  
file_path: m2cgen/m2cgen/interpreters/c_sharp/code_generator.py
imports: from contextlib import contextmanager
  from m2cgen.interpreters.code_generator import CLikeCodeGenerator
label_desc: Use image node_id 1 for calling the CSharpCodeGenerator obj's underlying member method code with example usage: obj.add_class_def(class_name, modifier) without return types