Now updater can update itself.

SingleUpdater/frmMain.cs

@@ -11,6 +11,7 @@
 using System.Net;
 using System.IO;
 using System.IO.Compression;
+using System.Threading;
 using Microsoft.Win32;
 
 namespace SingleUpdater
@@ -22,52 +23,58 @@ public frmMain()
             InitializeComponent();
         }
 
-        private string getDownloadFolderPath()
+        private void UpdateDownloadProgress(object sender, DownloadProgressChangedEventArgs e)
         {
-            return Registry.GetValue(@"HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders", "{374DE290-123F-4565-9164-39C4925E467B}", String.Empty).ToString();
+            progressBar1.Value = (int)(e.ProgressPercentage / 100.0 * 50 + 25);
         }
 
         private void tmrTimer_Tick(object sender, EventArgs e)
         {
-            Process[] pname = Process.GetProcessesByName("Single2013");
-            if (pname.Length == 0)
+            bool isKilled = true;
+            foreach (Process proc in Process.GetProcesses()) {
+               if (proc.ProcessName == "Single2013" || proc.ProcessName.StartsWith("Single "))
+                    isKilled = false;
+            }
+            if (isKilled)
             {
                 tmrTimer.Enabled = false;
-                progressBar1.Value = 25;
+                progressBar1.Value = 0;
                 lblStatus.Text = "Checking Update Info...";
                 lblStatus.Invalidate();
                 lblStatus.Update();
                 lblStatus.Refresh();
                 Application.DoEvents();
                 WebClient c = new WebClient();
+                c.DownloadProgressChanged += new DownloadProgressChangedEventHandler(UpdateDownloadProgress);
                 try
                 {
                     string versioninfo = c.DownloadString("http://pjb7687.github.io/single/update.txt");
                     string url = versioninfo.Split('\n')[1];
 
-                    progressBar1.Value = 50;
+                    progressBar1.Value = 25;
                     lblStatus.Text = "Downloading file...";
                     lblStatus.Invalidate();
                     lblStatus.Update();
                     lblStatus.Refresh();
                     Application.DoEvents();
-                    c.DownloadFile(url, "update.zip");
-
+                    c.DownloadFileAsync(new Uri(url), "update.zip");
+                    while (progressBar1.Value < 75) {
+                        Thread.Sleep(10);
+                        Application.DoEvents();
+                    }
                     progressBar1.Value = 75;
                     lblStatus.Text = "Decompressing downloaded file...";
                     lblStatus.Invalidate();
                     lblStatus.Update();
                     lblStatus.Refresh();
                     Application.DoEvents();
                     FileInfo fi = new FileInfo(Process.GetCurrentProcess().MainModule.FileName);
+                    System.IO.File.Move(Application.ExecutablePath, Application.ExecutablePath + ".old");
                     using (ZipArchive archive = ZipFile.OpenRead("update.zip"))
                     {
                         foreach (ZipArchiveEntry entry in archive.Entries)
                         {
-                            if (!entry.FullName.EndsWith("SingleUpdater.exe", StringComparison.OrdinalIgnoreCase))
-                            {
-                                entry.ExtractToFile(Path.Combine(fi.DirectoryName, entry.FullName), true);
-                            }
+                            entry.ExtractToFile(Path.Combine(fi.DirectoryName, entry.FullName), true);
                         }
                     }
 
@@ -78,15 +85,27 @@ private void tmrTimer_Tick(object sender, EventArgs e)
                     lblStatus.Refresh();
                     Application.DoEvents();
 
+                    System.IO.File.Delete("update.zip");
                     if (MessageBox.Show(null, "Done! Do you want to run Single?", "Update", MessageBoxButtons.YesNo) == DialogResult.Yes)
                         Process.Start(fi.DirectoryName + "\\Single2013.exe");
-                    Process.GetCurrentProcess().Kill();
+
+                    ProcessStartInfo startInfo = new ProcessStartInfo();
+                    startInfo.FileName = "cmd.exe";
+                    startInfo.Arguments = "/C choice /C Y /N /D Y /T 3 & Del \"" + Application.ExecutablePath + ".old\"";
+                    startInfo.UseShellExecute = false;
+                    startInfo.CreateNoWindow = true;
+
+                    Process delProc = new Process();
+                    delProc.StartInfo = startInfo;
+                    delProc.Start();
+
+                    Application.Exit();
                 }
                 catch (Exception ex)
                 {
                     MessageBox.Show(ex.ToString());
                     MessageBox.Show("An error occured while updating. Please download and install Single manually!");
-                    Process.GetCurrentProcess().Kill();
+                    Application.Exit();
                 }
             }
         }