ComponentDataWrapper - cannot resolve symbol

Doing an online tutorial to learn about ECS...I have an error that's driving me nuts!! My understanding that ComponentDataWrapper is derived from IComponentData? Tells me cannot resolve symbol of bold below. If it is old news. Any idea how to fix? What I am missing?

Code:
using System;
using Unity.Entities;
using UnityEngine;

[Serializable]
public struct BlockControllerData : IComponentData
{

public float rotateSpeed;
public Vector3 rotatationDirection;

}

public class BlockControllerComponent : ComponentDataWrapper<BlockControllerData>
{

}

 

I am using Entities 0.0.12 Preview 24

 

All the *Wrapper were renamed to *Proxy in Preview 24.

 

You may also want to move the BlockControllerComponent to it's own cs file. I couldn't add it to the GameObjectEntity until it was in a seperate file.

 

Classic Unity rules still apply. MonoBehaviours (Proxies) need to be named the same as the file. So they can exist in the same file, the file just needs to be named after the Proxy not the ComponentData.

I like to keep them together otherwise it becomes a huge mess but there are style guidelines that suggest always separating classes/structs into their own files.

 

Confirmed and thanks.

 

Hi,I am learning about ECS.And I have a error,how can I fix it?
error CS0246: The type or namespace name 'ComponentDataWrapper<>' could not be found (are you missing a using directive or an assembly reference?)

 

It’s obsolete and renamed to ComponentDataProxy, but it’s deprecated too. Use new conversion pipeline.

 

Thank you .
Where can I find the new pipeline related documents?

 

https://forum.unity.com/threads/new-subscene-converttoentity-workflows.638785/

 

thanks