Read Only property drawer extension for unity

ReadOnlyPropertyDrawer.cs

// NOTE put in a Editor folder

using UnityEngine;
using UnityEditor;
using System.Collections;

[CustomPropertyDrawer(typeof(ReadOnlyAttribute))]
public class ReadOnlyPropertyDrawer : PropertyDrawer 
{
	public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
	{
		GUI.enabled = false;
		EditorGUI.PropertyField(position, property, label);
		GUI.enabled = true;
	}
}

ReadOnlyAttribute.cs

// NOTE DONT put in an editor folder

using UnityEngine;
public class ReadOnlyAttribute : PropertyAttribute { }