如何实现方法体为空的接口返回IAsyncResult

using System;
using System.Threading;

public interface IMyInterface
{
    IAsyncResult BeginOperation(AsyncCallback callback, object state);
    void EndOperation(IAsyncResult asyncResult);
}

public class MyClass : IMyInterface
{
    public IAsyncResult BeginOperation(AsyncCallback callback, object state)
    {
        // 方法体为空
        return new AsyncResult(callback, state);
    }

    public void EndOperation(IAsyncResult asyncResult)
    {
        // 可以在这里进行后续处理
    }
}

public class AsyncResult : IAsyncResult
{
    private AsyncCallback callback;
    private object state;

    public AsyncResult(AsyncCallback callback, object state)
    {
        this.callback = callback;
        this.state = state;
    }

    // 实现IAsyncResult接口的其他成员
    // ...

    public object AsyncState => state;

    public WaitHandle AsyncWaitHandle => null;

    public bool CompletedSynchronously => true;

    public bool IsCompleted => true;
}

public class Program
{
    public static void Main()
    {
        IMyInterface myObject = new MyClass();
        IAsyncResult result = myObject.BeginOperation(null, null);
        myObject.EndOperation(result);
    }
}