报的错是:System.IO.FileNotFoundException: Could not load file or assembly 'Interop.Excel, Version=1.5.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified. File name: 'Interop.Excel, Version=1.5.0.0, Culture=neutral, PublicKeyToken=null'
File name: 'Interop.Excel, Version=1.5.0.0, Culture=neutral, PublicKeyToken=null'