The msil and metadata are contained in a portable executable file that is based on and extends the published microsoft pe and common object file format coff used historically for executable content Msil和元数据包含在一个可移植可执行( pe )文件中,此文件基于并扩展过去用于可执行内容的已公布的microsoft pe和公共对象文件格式( coff ) 。