回复allen：win7 专业版 sp1，dotnet 4.0.30319，没有安装任何补丁。 运行 demon 内已经编译的程序出错。 See the end of this message for details on invoking just-in-time (JIT) debugging instead of this dialog box. ************** Exception Text ************** System.IO.FileLoadException: Could not load file or assembly 'System.Core, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e, Retargetable=Yes' or one of its dependencies. The given assembly name or codebase was invalid. (Exception from HRESULT: 0x80131047) File name: 'System.Core, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e, Retargetable=Yes'    at RBTI.Toolbox.RasConnect.FormStarting.FormMain_Load(Object sender, EventArgs e)    at System.Windows.Forms.Form.OnLoad(EventArgs e)    at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)    at System.Windows.Forms.Control.CreateControl()    at System.Windows.Forms.Control.WmShowWindow(Message& m)    at System.Windows.Forms.Control.WndProc(Message& m)    at System.Windows.Forms.Form.WmShowWindow(Message& m)    at System.Windows.Forms.Form.WndProc(Message& m)    at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) WRN: Assembly binding logging is turned OFF. To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1. Note: There is some performance penalty associated with assembly bind failure logging. To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog]. ************** Loaded Assemblies ************** mscorlib     Assembly Version: 4.0.0.0     Win32 Version: 4.0.30319.1 (RTMRel.030319-0100)     CodeBase: file:///C:/Windows/Microsoft.NET/Framework64/v4.0.30319/mscorlib.dll ---------------------------------------- RasConnect     Assembly Version: 1.0.0.19100     Win32 Version: 1.0.0.0     CodeBase: file:///C:/Users/Administrator/Desktop/Debug/RasConnect.exe ---------------------------------------- System.Windows.Forms     Assembly Version: 4.0.0.0     Win32 Version: 4.0.30319.1 built by: RTMRel     CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Windows.Forms/v4.0_4.0.0.0__b77a5c561934e089/System.Windows.Forms.dll ---------------------------------------- System     Assembly Version: 4.0.0.0     Win32 Version: 4.0.30319.1 built by: RTMRel     CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System/v4.0_4.0.0.0__b77a5c561934e089/System.dll ---------------------------------------- System.Drawing     Assembly Version: 4.0.0.0     Win32 Version: 4.0.30319.1 built by: RTMRel     CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/System.Drawing/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll ---------------------------------------- Accessibility     Assembly Version: 4.0.0.0     Win32 Version: 4.0.30319.1 built by: RTMRel     CodeBase: file:///C:/Windows/Microsoft.Net/assembly/GAC_MSIL/Accessibility/v4.0_4.0.0.0__b03f5f7f11d50a3a/Accessibility.dll ---------------------------------------- System.Threading.Tasks     Assembly Version: 2.6.8.0     Win32 Version: 2.6.8.0     CodeBase: file:///C:/Users/Administrator/Desktop/Debug/System.Threading.Tasks.DLL ---------------------------------------- Microsoft.Threading.Tasks     Assembly Version: 1.0.12.0     Win32 Version: 1.0.168.0     CodeBase: file:///C:/Users/Administrator/Desktop/Debug/Microsoft.Threading.Tasks.DLL ---------------------------------------- ************** JIT Debugging ************** To enable just-in-time (JIT) debugging, the .config file for this application or computer (machine.config) must have the jitDebugging value set in the system.windows.forms section. The application must also be compiled with debugging enabled. For example: <configuration>     <system.windows.forms jitDebugging="true" /> </configuration> When JIT debugging is enabled, any unhandled exception will be sent to the JIT debugger registered on the computer rather than be handled by this dialog box.