System.ArgumentNullException はハンドルされませんでした。

  Message=値を Null にすることはできません。

パラメーター名: item

  ParamName=item

  Source=System.Windows.Forms

  StackTrace:

       場所 System.Windows.Forms.ListBox.ObjectCollection.AddInternal(Object item)

       場所 System.Windows.Forms.ListBox.ObjectCollection.AddRangeInternal(ICollection items)

       場所 System.Windows.Forms.ListBox.ObjectCollection.AddRange(Object[] items)

       場所 KaosuChat.Form1.Form1_Load(Object sender, EventArgs e) 場所 C:\Users\hajime2\documents\visual studio 2010\Projects\KaosuChat\KaosuChat\Form1.vb:行 22

       場所 System.EventHandler.Invoke(Object sender, EventArgs e)

       場所 System.Windows.Forms.Form.OnLoad(EventArgs e)

       場所 System.Windows.Forms.Form.OnCreateControl()

       場所 System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)

       場所 System.Windows.Forms.Control.CreateControl()

       場所 System.Windows.Forms.Control.WmShowWindow(Message& m)

       場所 System.Windows.Forms.Control.WndProc(Message& m)

       場所 System.Windows.Forms.ScrollableControl.WndProc(Message& m)

       場所 System.Windows.Forms.Form.WmShowWindow(Message& m)

       場所 System.Windows.Forms.Form.WndProc(Message& m)

       場所 System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)

       場所 System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)

       場所 System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

       場所 System.Windows.Forms.SafeNativeMethods.ShowWindow(HandleRef hWnd, Int32 nCmdShow)

       場所 System.Windows.Forms.Control.SetVisibleCore(Boolean value)

       場所 System.Windows.Forms.Form.SetVisibleCore(Boolean value)

       場所 System.Windows.Forms.Control.set_Visible(Boolean value)

       場所 System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)

       場所 System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)

       場所 Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnRun()

       場所 Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoApplicationModel()

       場所 Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(String[] commandLine)

       場所 KaosuChat.My.MyApplication.Main(String[] Args) 場所 17d14f5c-a337-4978-8281-53493378c1071.vb:行 81

       場所 System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)

       場所 System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)

       場所 Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()

       場所 System.Threading.ThreadHelper.ThreadStart_Context(Object state)

       場所 System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)

       場所 System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)

       場所 System.Threading.ThreadHelper.ThreadStart()

  InnerException: