How to disable pdf save as button?

Hi Sergey Alexandrovich Kryukov,

I Developed file storage application in C#.net,Admin user upload the pdf files from that system,In specific requirement user can view only the content of pdf file and not allow to save local drive and also not allow to take printout.I findout solutions to disable pdf print option using iTextsharp but yet to not find the solution for disable save as option in pdf file.if there's any options and soltution please share with me.

Below mentioned code for disable print button in pdf file
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using iTextSharp;
using iTextSharp.text;
using iTextSharp.text.pdf;

protected void Page_Load(object sender, EventArgs e)
{

string WorkingFolder = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
string InputFile = Path.Combine(WorkingFolder, "StickerSheet_New.pdf");
string OutputFile = Path.Combine(WorkingFolder, "2.pdf");


using (Stream input = new FileStream(InputFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
using (Stream output = new FileStream(OutputFile, FileMode.Create, FileAccess.Write, FileShare.None))
{

PdfReader reader = new PdfReader(input);
//PdfEncryptor.Encrypt(reader, output, true, "23!54", "23!54", PdfWriter.ALLOW_SCREENREADERS);
System.Text.UTF8Encoding Encoding = new System.Text.UTF8Encoding();

PdfStamper stamper = new PdfStamper(reader, output);
stamper.SetEncryption(Encoding.GetBytes("23!54"), null, PdfWriter.AllowScreenReaders, PdfWriter.STRENGTH40BITS );
//output.ViewerPreferences.HideToolbar = true;
//PdfReader pReader = new PdfReader();
//PdfEncryptor.Encrypt(reader, new FileStream("1.pdf", FileMode.Open), PdfWriter.STRENGTH128BITS, "23!54", null, PdfWriter.AllowScreenReaders);
stamper.Close();
reader.Close();
Response.Write("PDF created");
}
}
}

}
}