how to convert php code to mvc3 or c#

$ratio2)    {
          $thumb_w=$new_w;
          $thumb_h=$old_y/$ratio1;
        }
        else    {
          $thumb_h=$new_h;
          $thumb_w=$old_x/$ratio2;
        }
          // we create a new image with the new dimmensions
        $dst_img=ImageCreateTrueColor($thumb_w,$thumb_h);
        // resize the big image to the new created one
        imagecopyresampled($dst_img,$src_img,0,0,0,0,$thumb_w,$thumb_h,$old_x,$old_y);
        // output the created image to the file. Now we will have the thumbnail into the file named by $filename
        if(!strcmp("png",$ext))
          imagepng($dst_img,$filename);
        else
          imagejpeg($dst_img,$filename);

          //destroys source and destination images.
        imagedestroy($dst_img);
        imagedestroy($src_img);
       }
       function getExtension($str) {
               $i = strrpos($str,".");
               if (!$i) { return ""; }
               $l = strlen($str) - $i;
               $ext = substr($str,$i+1,$l);
               return $ext;
       }

        //reads the name of the file the user submitted for uploading
       $image=$_FILES[$fileElementName]['name'];

    // if it is not empty
    if ($image)
    {
        // get the original name of the file from the clients machine
        $filename = stripslashes($_FILES[$fileElementName]['name']);

        // get the extension of the file in a lower case format
        $extension = getExtension($filename);
        $extension = strtolower($extension);
        // if it is not a known extension, we will suppose it is an error, print an error message
        //and will not upload the file, otherwise we continue
        if (($extension != "jpg")  && ($extension != "jpeg") && ($extension != "png"))
        {
            $error .= 'Unknown extension!';
            $errors=1;
        }
        else
        {
            
            $size=getimagesize($_FILES[$fileElementName]['tmp_name']);
            $sizekb=filesize($_FILES[$fileElementName]['tmp_name']);

            //compare the size with the maxim size we defined and print error if bigger
            if ($sizekb > MAX_SIZE*1024)
            {
                $error .= 'You have exceeded the size limit!';
                $errors=1;
            }
            else {

              //we will give an unique name, for example the time in unix time format
            $image_name=time().'.'.$extension;
            //the new name will be containing the full path where will be stored (images folder)
            $newname="/images/masters/".$image_name;
            $copied = copy($_FILES[$fileElementName]['tmp_name'], $newname);
            //we verify if the image has been uploaded, and print error instead
            if (!$copied)
            {
              $error .= 'Copy unsuccessfull!';
              $errors=1;
            }
            else
            {
              // the new thumbnail image will be placed in images/thumbs/ folder
              $thumb_name='/images/thumbs/thumb_'.$image_name;
              // call the function that will create the thumbnail. The function will get as parameters
              //the image name, the thumbnail name and the width and height desired for the thumbnail
              $thumb=make_thumb($newname,$thumb_name,40,40);

              //also add the users pic
              $thumb_name='/images/thumbs/thumb_'.$image_name;
              $thumb=make_thumb($newname,$thumb_name,110,110);

            }}
        }
            }

      //--------- END SECOND SCRIPT --------------------------------------------------------------------

      //return variables to javascript
            $filename = $_FILES[$fileElementName]['name'];
            $filesize = round(($sizekb/1000), 0);
            $fileloc = $thumb_name;
            //for security reason, we force to remove all uploaded file
            @unlink($_FILES[$fileElementName]);
    }
    $return_JSON = "";
    $return_JSON .= "{";
    $return_JSON .=             "error: '" . $error . "',\n";
    $return_JSON .=             "name: '" . $filename . "',\n";
    $return_JSON .=             "size: '" . $filesize . "',\n";
    $return_JSON .=             "loc: '" . $fileloc . "'\n";
    $return_JSON .= "}";
    echo $return_JSON;
?>