Editor script to save slected items as prefabs (fixed Directory Seperator on windows)

SaveSelected.cs

using UnityEditor;
using UnityEngine;
using System.Collections;
using System; 
using System.IO;

class CreatePrefabFromSelected : ScriptableObject
{
    const string menuTitle = "GameObject/Create Prefab From Selected";
 
    /// <summary>
    /// Creates a prefab from the selected game object.
    /// </summary>
    [MenuItem(menuTitle)]
    static void CreatePrefab()
    {
             var objs = Selection.gameObjects;
 
			string pathBase = EditorUtility.SaveFolderPanel ("Choose save folder", "Assets", "");
 
			if (! String.IsNullOrEmpty (pathBase)) {
 
				pathBase=pathBase.Remove(0,pathBase.IndexOf("Assets"))+Path.DirectorySeparatorChar;
 
								foreach (var go in objs) {
										String localPath = pathBase + go.name + ".prefab";
 
										if (AssetDatabase.LoadAssetAtPath (localPath, typeof(GameObject))) {
												if (EditorUtility.DisplayDialog ("Are you sure?", 
						                                "The prefab already exists. Do you want to overwrite it?", 
						                                "Yes", 
						                                "No"))
							CreateNew (go, localPath);
										} else
												CreateNew (go, localPath);
								}
						}
    }
 
    static void CreateNew(GameObject obj, string localPath)
    {

		localPath = localPath.Replace('\\','/');

        UnityEngine.Object prefab = PrefabUtility.CreatePrefab (localPath, obj);
        EditorUtility.ReplacePrefab(obj, prefab, ReplacePrefabOptions.ConnectToPrefab);
        AssetDatabase.Refresh();
    }
 
    /// <summary>
    /// Validates the menu.
    /// </summary>
    /// <remarks>The item will be disabled if no game object is selected.</remarks>
    [MenuItem(menuTitle, true)]
    static bool ValidateCreatePrefab()
    {
        return Selection.activeGameObject != null;
    }
}