Recursively update files & folders to a SharePoint Library

Recursively update files & folders to a SharePoint Library

using Microsoft.SharePoint;
using Microsoft.SharePoint.Administration;
using System.IO;

 private void button1_Click(object sender, EventArgs e)
        {
            string strSourcePath = txtLocalSource.Text;
            string strSiteUrl = txtServerUrl.Text;
            string strLibraryName = txtLibraryName.Text;

            try
            {
                using (SPSite site = new SPSite(@strSiteUrl))
                {
                    SPWeb Web = site.OpenWeb();
                    UploadORCreateDirectories(strSourcePath,Web.Folders[strLibraryName].SubFolders);
                }
            }
            catch(Exception Ex)
            {
                MessageBox.Show(Ex.Message);
            }

           
        }


        //function
        private void UploadORCreateDirectories(string filePath, SPFolderCollection folderCollection)
        {
            //Upload all files
            foreach (FileInfo fi in new DirectoryInfo(filePath).GetFiles())
            {
                FileStream fileStream = File.OpenRead(fi.FullName);//Read stram
                SPFile spfile = folderCollection.Folder.Files.Add(fi.Name, fileStream, true);
                spfile.Update();
            }

            //Upload Multiple Folders
            foreach (DirectoryInfo di in new DirectoryInfo(filePath).GetDirectories())
            {
                string subFolderName = di.FullName.Split('\\')[di.FullName.Split('\\').Length - 1];
                SPFolder spNewFolder = folderCollection.Add(subFolderName);
                spNewFolder.Update();
                //Recursive call to create sub folders
                UploadORCreateDirectories(di.FullName, spNewFolder.SubFolders);
            }
        }