How to add item to list subfolder using Client object model

How to add item to list subfolder using Client object model

 protected void AddItemInFolder(object sender, EventArgs e)
        {
            string siteURL = SPContext.Current.Web.Url;
            AddItemInFolders(siteURL, "Docs", "Folder1/Folder2");//subfolders
            AddItemInFolders(siteURL, "Docs", "Folder1");//root folder
        }

        private void AddItemInFolders(string siteUrl, string listName, string folderPath)
        {
            using (var clientContext = new ClientContext(siteUrl))
            {
                var list = clientContext.Web.Lists.GetByTitle("Docs");

                ListItemCreationInformation listItemCreationInformation = null;
                if (!string.IsNullOrEmpty(folderPath))
                {
                    listItemCreationInformation = new ListItemCreationInformation();

                    listItemCreationInformation.LeafName = folderName;
                    listItemCreationInformation.UnderlyingObjectType = FileSystemObjectType.Folder;

                    listItemCreationInformation.FolderUrl = string.Format("{0}/lists/{1}/{2}", siteUrl, listName, folderPath);
                }

                var listItem = list.AddItem(listItemCreationInformation);
                listItem["Title"] = "Titile1";
                listItem.Update();
                clientContext.ExecuteQuery();

            }
        }