尊敬的各位:File videoFile = new File(videoFilePath); throw new FileNotFoundException("File " + videoFilePath + " not exists");if (!videoFile.canRead()) {
throw new IllegalStateException("No
SystemEvents.DisplaySettingsChanged -= new EventHandler(SystemEvents_DisplaySettingsChanged);
错误2当前上下文Form1.cs中不存在“Marshal”名称错误4名称“Form1_Paint”在当前上下文Fo