如何正确使用BeginRead的'state‘参数？

public virtual IAsyncResult BeginRead(byte[] buffer, int offset, int count, AsyncCallback callback, object state);

// 自定义状态类
public class MyState
{
    public byte[] Buffer { get; set; }
    public int Offset { get; set; }
    public int Count { get; set; }
    // 其他需要的状态信息
}

// 异步读取数据的方法
public void ReadData(Stream stream)
{
    byte[] buffer = new byte[1024];
    int offset = 0;
    int count = buffer.Length;

    // 创建自定义状态对象
    MyState state = new MyState
    {
        Buffer = buffer,
        Offset = offset,
        Count = count
        // 设置其他需要的状态信息
    };

    // 开始异步读取数据
    IAsyncResult result = stream.BeginRead(buffer, offset, count, ReadCallback, state);
}

// 异步读取完成后的回调函数
public void ReadCallback(IAsyncResult result)
{
    // 获取传递的状态对象
    MyState state = (MyState)result.AsyncState;

    // 获取异步读取的结果
    int bytesRead = stream.EndRead(result);

    // 处理读取的数据
    // ...

    // 继续异步读取数据
    stream.BeginRead(state.Buffer, state.Offset, state.Count, ReadCallback, state);
}