title: Why I cannot access the C:\WINDOWS\assembly\GAC Folder?
body: <p>I find the path of Microsoft.Office>interop.Excel under the Solution/References is</p>
  
  <p>C:\WINDOWS\assembly\GAC\Microsoft.Office.Interop.Excel\11.0.0.0__71e9bce111e9429c\Microsoft.Office.Interop.Excel.dll</p>
  
  <p>However, such a file doesn't exist on my C:\WINDOWS\assembly\GAC at all. Further, there is not GAC folder under C:\WINDOWS\assembly.</p>
  
  <p>Any idea?</p>