Zip Error

System.ArgumentNullException: Value cannot be null.
Parameter name: path
   at System.IO.Directory.CreateDirectory(String path)
   at ICSharpCode.SharpZipLib.Zip.FastZip.ExtractEntry(ZipEntry entry)
   at ICSharpCode.SharpZipLib.Zip.FastZip.ExtractZip(Stream inputStream, String targetDirectory, Overwrite overwrite, ConfirmOverwriteDelegate confirmDelegate, String fileFilter, String directoryFilter, Boolean restoreDateTime, Boolean isStreamOwner)
   at ICSharpCode.SharpZipLib.Zip.FastZip.ExtractZip(String zipFileName, String targetDirectory, Overwrite overwrite, ConfirmOverwriteDelegate confirmDelegate, String fileFilter, String directoryFilter, Boolean restoreDateTime)
   at ICSharpCode.SharpZipLib.Zip.FastZip.ExtractZip(String zipFileName, String targetDirectory, String fileFilter)
   at MCSwitcher.Form1.deleteMETAINFToolStripMenuItem_Click(Object sender, EventArgs e) in C:\Users\adrian\Documents\Visual Studio 2010\Projects\MCSwitcher\MCSwitcher\Form1.cs:line 266