7-zip compression on asp.net website

I am trying to use 7-zip compression to create a sample zip file as stated in the example http://www.dotnetperls.com/7-zip As the url says, "you must specify" Copy if new "or" Copy always "to copy files such as executables to the output directory."

I found that when I use this code in a VS project I get the option to specify "Copy if new" when I see the properties of 7za.exe in the properties window

But when I use VS website, I cannot find this setting. As a result, when I debug this program, it says that it cannot be found 7za.exe

string sourceName = "pdfSample.pdf";
string targetName = "pdfSample.gz";

ProcessStartInfo p = new ProcessStartInfo();
p.FileName = "7za.exe";

p.Arguments = "a -tgzip \"" + targetName + "\" \"" + sourceName + "\" -mx=9";
p.WindowStyle = ProcessWindowStyle.Hidden;

try
{
    Process x = Process.Start(p);
    x.WaitForExit();
}
catch (Exception ex)
{
    Console.Write(ex.ToString());
} 

      

        
        
        
      

    

Any idea why there is no "Copy if new" option in the case of the VS website?

Thank!