System.NotSupportedException was unhandled
  HResult=-2146233067
  Message=This stream does not support seek operations.
  Source=System
  StackTrace:
       at System.Net.ConnectStream.get_Length()
       at Launchpad.Launcher.Handlers.Protocols.HTTPProtocolHandler.ReadRemoteFile(String URL, Boolean useAnonymousLogin) in D:\Desktop\Launchpad-master\Launchpad.Launcher\Handlers\Protocols\HTTPProtocolHandler.cs:line 663
       at Launchpad.Launcher.Handlers.Protocols.HTTPProtocolHandler.GetRemoteLauncherVersion() in D:\Desktop\Launchpad-master\Launchpad.Launcher\Handlers\Protocols\HTTPProtocolHandler.cs:line 788
       at Launchpad.Launcher.Handlers.Protocols.HTTPProtocolHandler.IsLauncherOutdated() in D:\Desktop\Launchpad-master\Launchpad.Launcher\Handlers\Protocols\HTTPProtocolHandler.cs:line 110
       at Launchpad.Launcher.Handlers.ChecksHandler.IsLauncherOutdated() in D:\Desktop\Launchpad-master\Launchpad.Launcher\Handlers\ChecksHandler.cs:line 129
       at Launchpad.Launcher.WindowsUI.MainForm..ctor() in D:\Desktop\Launchpad-master\Launchpad.Launcher\Windows-UI\MainForm.cs:line 144
       at Launchpad.Launcher.Program.Main() in D:\Desktop\Launchpad-master\Launchpad.Launcher\Program.cs:line 57
       at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException: