COMException: OpenClipboard 失败 (异常来自 HRESULT:0x800401D0 (CLIPBRD_E_CANT_OPEN))
StackTrace:
   在 System.Runtime.InteropServices.Marshal.ThrowExceptionForHRInternal(Int32 errorCode, IntPtr errorInfo)
   在 System.Windows.Clipboard.Flush()
   在 System.Windows.Clipboard.CriticalSetDataObject(Object data, Boolean copy)
   在 System.Windows.Clipboard.SetDataInternal(String format, Object data)
   在 __ScriptExecution.__5svs9tri.ScreenRuler.<>c__DisplayClass139_0.<<ShowDistanceMeasureOverlay>g__TriggerClick|1>d.MoveNext()
--- 引发异常的上一位置中堆栈跟踪的末尾 ---
   在 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   在 System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   在 System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)