使用C#语言实现,实现window系统中拖动文件至C#窗口中，主要对波形音频文件的简单判断，和图片在窗口中显示。功能虽小，希望能在实际的开发中能帮上忙-The use of C# language, realize the drag the file to the C# window in window system, mainly on the waveform audio file simple judgment, and the picture is displayed in a wind