Dotnet get the number of pages in a PDF file

        #regionGet the number of pages in a PDF filePrivate intByteslastindexof (byte[] buffer,intLengthstringSearch) {            if(Buffer = =NULL)                return-1; if(buffer. Length <=0)                return-1; byte[] Searchbytes =Encoding.Default.GetBytes (Search.toupper ());  for(inti = length-searchbytes.length; I >=0; i--)            {                BOOLBfound =true;  for(intj =0; J < Searchbytes.length; J + +)                {                    if(Byteupper (Buffer[i + j])! =Searchbytes[j]) {Bfound=false;  Break; }                }                if(Bfound)returni; }            return-1; }        Private byteByteupper (bytebytevalue) {            CharCharvalue =Convert.tochar (Bytevalue); if(Charvalue <'a'|| Charvalue >'Z')                returnBytevalue; Else                returnConvert.tobyte (Bytevalue- +); }        /// <summary>        ///get the number of pages in a PDF file/// </summary>         Public intGetpdfpagecount (stringPath//get the number of pages in a PDF file{Path=HttpContext.Current.Server.MapPath (path); byte[] buffer =file.readallbytes (path); intLength =buffer.            Length; if(Buffer = =NULL)                return-1; if(buffer. Length <=0)                return-1; Try            {                //Sample//0 obj//<</count 9//type/pages                inti =0; intNPos = byteslastindexof (buffer, length,"/type/pages"); if(NPos = =-1)                    return-1; stringPageCount =NULL;  for(i = nPos; i < length-Ten; i++)                {                    if(Buffer[i] = ='/'&& Buffer[i +1] =='C'&& Buffer[i +2] =='o'&& Buffer[i +3] =='u'&& Buffer[i +4] =='N'&& Buffer[i +5] =='T')                    {                        intj = i +3;  while(Buffer[j]! ='/'&& Buffer[j]! ='>') J++; PageCount= Encoding.Default.GetString (buffer, I, J-i);  Break; }                }                if(PageCount = =NULL)                    return-1; intn = pagecount.indexof ("Count"); if(N >0) {PageCount= pagecount.substring (n +5).                    Trim ();  for(i = pagecount.length-1; I >=0; i--)                    {                        if(Pagecount[i] >='0'&& Pagecount[i] <='9')                        {                            return int. Parse (Pagecount.substring (0, i +1)); }                    }                }                return-1; }            Catch(Exception ex) {return-1; }        }        #endregion

Dotnet get the number of pages in a PDF file