An instance of Front Mission already

An instance of Front Mission already Object reference not set to an instance of an object. an instance of this application is already runing是什么意思? 英语翻译No enclosing instance of type char is accessible.Must qualify the allocation with an enclosing instance of type char Object reference not set to an instance of an object.请问, Object reference not set to an instance of an object这句英语是什么意思 丧尸围城2错误 An instance of this appocation is already running An instance of Quake Live is already running.Please close this web page. 英语翻译A static inner class has no reference to an instance of the enclosing class. ASP.NET错误：Object reference not set to an instance of an objectServer Error in '/' Application.--------------------------------------------------------------------------------Object reference not set to an instance of an object.Description:An un 是for an instance 还是for instance?问题 如上 出现这个（0bject reference not set to an instance of an object.出现这个（0bject reference not set to an instance of an object.） 要怎么解决呢? instance of方法的含义 is there an old sofa in front of the wall? AN invention in front of your eyes翻译 An old man is_______(sit) in front of his house The teacher is standing__the class an giving his lessons.A:in the front of B:at the front ofC:in front of D:at the front 为什么我下的丧尸围城2一直弹An instance of this application is already runnin