Coroutines not working

Unity - Руководство: Coroutines

have bugs when using the Coroutines?
You can not use them ?
Sorry, my bad english)

 

Type not correct?

using System.Collections; <> using System.Collections.Generic;

 

How use Corountine in Plugin Unity ?

 

Code:

using UnityEngine;
using System.Collections.Generic;namespace Oxide.Plugins
{
    [Info("MyPlugin", "xxx", "0.0.1")]
    [Description("This Plugin displays...")]
    class MyPlugin : RustPlugin
    {
        public class SubClass : MonoBehaviour   //<<< Works ONLY with MonoBehaviour as Nested-Class
        {
            IEnumerator Start()
            {
                StartCoroutine("DoSomething", 2.0F);
                yield return new WaitForSeconds(1);
                StopCoroutine("DoSomething");
            }
          
            IEnumerator DoSomething(float someParameter)
            {
                while (true)
                {
                    print("DoSomething Loop");
                    yield return null;
                }
            }
        }
    }
}