the framework don't suggest or recognize the method GUI.Button

Unity Engine
1

When i write GUI. the framework don’t recognize .Button, i need unity pro?,
instead i use UnityEditor and Editor.GUI, but when i built the game throw me that i have compiler erros and in console show me this:

Assets/ControlCamara.cs(2,7): error CS0246: The type or namespace name `UnityEditor’ could not be found. Are you missing a using directive or an assembly reference?

but in the scrip in that line i have: using UnityEditor;

2

You can’t use Editor classes unless the script is in a folder named “Editor”.

3

Is your script named GUI? Do not name it like that.