Removal of OLE header from images

OLEObjectUtil.cs

    public static class OLEObjectUtil
    {
        private const string BITMAP_OLE_HEADER = "BM";
        private const string JPG_OLE_HEADER = "\u00FF\u00D8\u00FF";
        private const string PNG_OLE_HEADER = "\u0089PNG\r\n\u001a\n";
        private const string GIF_OLE_HEADER = "GIF8";
        private const string TIFF_OLE_HEADER = "II*\u0000";

        public static byte[] RemoveOleHeader(byte[] inputBytes)
        {
            string temp = Encoding.ASCII.GetString(inputBytes);

            // Get the first 300 characters from the string
            string strVTemp = temp.Substring(0, 300);

            // Search for the header
            int headerPos = -1;
            if (strVTemp.IndexOf(BITMAP_OLE_HEADER) != -1)
            {
                headerPos = strVTemp.IndexOf(BITMAP_OLE_HEADER);
            }
            else if (strVTemp.IndexOf(JPG_OLE_HEADER) != -1)
            {
                headerPos = strVTemp.IndexOf(JPG_OLE_HEADER);
            }
            else if (strVTemp.IndexOf(PNG_OLE_HEADER) != -1)
            {
                headerPos = strVTemp.IndexOf(PNG_OLE_HEADER);
            }
            else if (strVTemp.IndexOf(GIF_OLE_HEADER) != -1)
            {
                headerPos = strVTemp.IndexOf(GIF_OLE_HEADER);
            }
            else if (strVTemp.IndexOf(TIFF_OLE_HEADER) != -1)
            {
                headerPos = strVTemp.IndexOf(TIFF_OLE_HEADER);
            }
            else
            {
                // No OLE image header found, return original bytes
                return inputBytes;
            }

            // Copy data without header to new array and return it
            using (MemoryStream ms = new MemoryStream())
            {
                ms.Write(inputBytes, headerPos, inputBytes.Length - headerPos);
                return ms.ToArray();
            }
        }
    }