UnityEditor.ProjectWindowUtil.GetBaseFolders C# (CSharp) Method

        public static string[] GetBaseFolders(string[] folders)
        {
            if (folders.Length <= 1)
            {
                return folders;
            }
            List<string> list = new List<string>();
            List<string> list2 = new List<string>(folders);
            for (int i = 0; i < list2.Count; i++)
            {
                char[] trimChars = new char[] { '/' };
                list2[i] = list2[i].Trim(trimChars);
            }
            list2.Sort();
            for (int j = 0; j < list2.Count; j++)
            {
                if (!list2[j].EndsWith("/"))
                {
                    list2[j] = list2[j] + "/";
                }
            }
            string item = list2[0];
            list.Add(item);
            for (int k = 1; k < list2.Count; k++)
            {
                if (list2[k].IndexOf(item, StringComparison.Ordinal) != 0)
                {
                    list.Add(list2[k]);
                    item = list2[k];
                }
            }
            for (int m = 0; m < list.Count; m++)
            {
                char[] chArray2 = new char[] { '/' };
                list[m] = list[m].Trim(chArray2);
            }
            return list.ToArray();
        }

        void SearchInFolders(HierarchyProperty property)
        {
            List <FilterResult> list = new List <FilterResult>();

            string[] baseFolders = ProjectWindowUtil.GetBaseFolders(m_SearchFilter.folders);

            foreach (string folderPath in baseFolders)
            {
                // Ensure we do not have a filter when finding folder
                property.SetSearchFilter(new SearchFilter());

                int folderInstanceID = AssetDatabase.GetMainAssetInstanceID(folderPath);
                if (property.Find(folderInstanceID, null))
                {
                    // Set filter after we found the folder
                    property.SetSearchFilter(m_SearchFilter);
                    int   folderDepth = property.depth;
                    int[] expanded    = null; // enter all children of folder
                    while (property.NextWithDepthCheck(expanded, folderDepth + 1))
                    {
                        FilterResult result = new FilterResult();
                        CopyPropertyData(ref result, property);
                        list.Add(result);
                    }
                }
            }
            m_Results = list.ToArray();
        }