c# - Using ZipFile compression: An unhandled exception of type 'System.IO.IOException' occurred in mscorlib.dll -

i'm unsure why exception happening after folder contents zipped. should right?

error: unhandled exception of type 'system.io.ioexception' occurred in mscorlib.dll additional information: process cannot access file 'c:\temp\pack.zip' because being used process.

    private static string directorypath = @"c:\temp\";     static void main(string[] args)     {         zipfolder(directorypath, directorypath+@"pack.zip");     }      public static void zipfolder(string targetpath, string resultpath)     {         zipfile.createfromdirectory(targetpath, resultpath,compressionlevel.optimal,true);     } 

what doing in code reading content of c:\temp while trying create zip file in same directory.

instead create file in app directory , copy file temp folder later on.

        var newfilepath = path.combine(directorypath, "pack.zip");         if(file.exists(newfilepath))file.delete(newfilepath); //remove file if exists         if (file.exists("pack.zip")) file.delete("pack.zip"); //remove file if exists         zipfolder(directorypath, "pack.zip");         file.move("pack.zip", newfilepath);