从C＃应用程序打开文件时，是否值得在注册表中查找默认应用程序？

I'm building an application (a side project which is likely to enlist the help of the stackoverflow community on more than one occasion) which will need to open a variety of file types (i.e. open Word documents in Word, not natively in my application).I'm building an application (a side project whi