How to troubleshoot errors: A script behaviour has a different serialization layout when loading

In actual development encountered a problem, loading a prefab,unity will report the following error:

A script behaviour has a different serialization layout when loading. (Read bytes but expected bytes), Did you #ifdef unity_editor a section of your serialized properties into any of your Scripts?

Here's the code:

Using Unityengine;

public class Objectpreview:monobehaviour 
{
    #if unity_editor public
	gameobject obj;

	void Start () 
	{
		//code ...
	}

    #endif
}

In other words, Objectpreview in editor mode and non-editor mode, the serialized content is different

So, because art (or other team members) do prefab in an editor environment, it's serialized data with obj.

At runtime, however, this unity_editor macro causes the runtime to be different from the editor serialization.

The right thing to do is to remove the #if unity_editor or wrap the #if unity_editor the entire class.