Get mime type from extension and vice verse

MimeTypeHelper.cs

/// <summary>
        /// Thanks for cymen's mimetype collection
        /// https://github.com/cymen/ApacheMimeTypesToDotNet
        /// </summary>
        private static Dictionary<string, string> mimeTypes = new Dictionary<string, string>
		{
			{ "123", "application/vnd.lotus-1-2-3" },
			{ "3dml", "text/vnd.in3d.3dml" },
			{ "3g2", "video/3gpp2" },
			{ "3gp", "video/3gpp" },
			{ "7z", "application/x-7z-compressed" },
			{ "aab", "application/x-authorware-bin" },
			{ "aac", "audio/x-aac" },
			{ "aam", "application/x-authorware-map" },
			{ "aas", "application/x-authorware-seg" },
			{ "abw", "application/x-abiword" },
			{ "ac", "application/pkix-attr-cert" },
			{ "acc", "application/vnd.americandynamics.acc" },
			{ "ace", "application/x-ace-compressed" },
			{ "acu", "application/vnd.acucobol" },
			{ "acutc", "application/vnd.acucorp" },
			{ "adp", "audio/adpcm" },
			{ "aep", "application/vnd.audiograph" },
			{ "afm", "application/x-font-type1" },
			{ "afp", "application/vnd.ibm.modcap" },
			{ "ahead", "application/vnd.ahead.space" },
			{ "ai", "application/postscript" },
			{ "aif", "audio/x-aiff" },
			{ "aifc", "audio/x-aiff" },
			{ "aiff", "audio/x-aiff" },
			{ "air", "application/vnd.adobe.air-application-installer-package+zip" },
			{ "ait", "application/vnd.dvb.ait" },
			{ "ami", "application/vnd.amiga.ami" },
			{ "apk", "application/vnd.android.package-archive" },
			{ "application", "application/x-ms-application" },
			{ "apr", "application/vnd.lotus-approach" },
			{ "asc", "application/pgp-signature" },
			{ "asf", "video/x-ms-asf" },
			{ "asm", "text/x-asm" },
			{ "aso", "application/vnd.accpac.simply.aso" },
			{ "asx", "video/x-ms-asf" },
			{ "atc", "application/vnd.acucorp" },
			{ "atom", "application/atom+xml" },
			{ "atomcat", "application/atomcat+xml" },
			{ "atomsvc", "application/atomsvc+xml" },
			{ "atx", "application/vnd.antix.game-component" },
			{ "au", "audio/basic" },
			{ "avi", "video/x-msvideo" },
			{ "aw", "application/applixware" },
			{ "azf", "application/vnd.airzip.filesecure.azf" },
			{ "azs", "application/vnd.airzip.filesecure.azs" },
			{ "azw", "application/vnd.amazon.ebook" },
			{ "bat", "application/x-msdownload" },
			{ "bcpio", "application/x-bcpio" },
			{ "bdf", "application/x-font-bdf" },
			{ "bdm", "application/vnd.syncml.dm+wbxml" },
			{ "bed", "application/vnd.realvnc.bed" },
			{ "bh2", "application/vnd.fujitsu.oasysprs" },
			{ "bin", "application/octet-stream" },
			{ "bmi", "application/vnd.bmi" },
			{ "bmp", "image/bmp" },
			{ "book", "application/vnd.framemaker" },
			{ "box", "application/vnd.previewsystems.box" },
			{ "boz", "application/x-bzip2" },
			{ "bpk", "application/octet-stream" },
			{ "btif", "image/prs.btif" },
			{ "bz", "application/x-bzip" },
			{ "bz2", "application/x-bzip2" },
			{ "c", "text/x-c" },
			{ "c11amc", "application/vnd.cluetrust.cartomobile-config" },
			{ "c11amz", "application/vnd.cluetrust.cartomobile-config-pkg" },
			{ "c4d", "application/vnd.clonk.c4group" },
			{ "c4f", "application/vnd.clonk.c4group" },
			{ "c4g", "application/vnd.clonk.c4group" },
			{ "c4p", "application/vnd.clonk.c4group" },
			{ "c4u", "application/vnd.clonk.c4group" },
			{ "cab", "application/vnd.ms-cab-compressed" },
			{ "car", "application/vnd.curl.car" },
			{ "cat", "application/vnd.ms-pki.seccat" },
			{ "cc", "text/x-c" },
			{ "cct", "application/x-director" },
			{ "ccxml", "application/ccxml+xml" },
			{ "cdbcmsg", "application/vnd.contact.cmsg" },
			{ "cdf", "application/x-netcdf" },
			{ "cdkey", "application/vnd.mediastation.cdkey" },
			{ "cdmia", "application/cdmi-capability" },
			{ "cdmic", "application/cdmi-container" },
			{ "cdmid", "application/cdmi-domain" },
			{ "cdmio", "application/cdmi-object" },
			{ "cdmiq", "application/cdmi-queue" },
			{ "cdx", "chemical/x-cdx" },
			{ "cdxml", "application/vnd.chemdraw+xml" },
			{ "cdy", "application/vnd.cinderella" },
			{ "cer", "application/pkix-cert" },
			{ "cgm", "image/cgm" },
			{ "chat", "application/x-chat" },
			{ "chm", "application/vnd.ms-htmlhelp" },
			{ "chrt", "application/vnd.kde.kchart" },
			{ "cif", "chemical/x-cif" },
			{ "cii", "application/vnd.anser-web-certificate-issue-initiation" },
			{ "cil", "application/vnd.ms-artgalry" },
			{ "cla", "application/vnd.claymore" },
			{ "class", "application/java-vm" },
			{ "clkk", "application/vnd.crick.clicker.keyboard" },
			{ "clkp", "application/vnd.crick.clicker.palette" },
			{ "clkt", "application/vnd.crick.clicker.template" },
			{ "clkw", "application/vnd.crick.clicker.wordbank" },
			{ "clkx", "application/vnd.crick.clicker" },
			{ "clp", "application/x-msclip" },
			{ "cmc", "application/vnd.cosmocaller" },
			{ "cmdf", "chemical/x-cmdf" },
			{ "cml", "chemical/x-cml" },
			{ "cmp", "application/vnd.yellowriver-custom-menu" },
			{ "cmx", "image/x-cmx" },
			{ "cod", "application/vnd.rim.cod" },
			{ "com", "application/x-msdownload" },
			{ "conf", "text/plain" },
			{ "cpio", "application/x-cpio" },
			{ "cpp", "text/x-c" },
			{ "cpt", "application/mac-compactpro" },
			{ "crd", "application/x-mscardfile" },
			{ "crl", "application/pkix-crl" },
			{ "crt", "application/x-x509-ca-cert" },
			{ "cryptonote", "application/vnd.rig.cryptonote" },
			{ "csh", "application/x-csh" },
			{ "csml", "chemical/x-csml" },
			{ "csp", "application/vnd.commonspace" },
			{ "css", "text/css" },
			{ "cst", "application/x-director" },
			{ "csv", "text/csv" },
			{ "cu", "application/cu-seeme" },
			{ "curl", "text/vnd.curl" },
			{ "cww", "application/prs.cww" },
			{ "cxt", "application/x-director" },
			{ "cxx", "text/x-c" },
			{ "dae", "model/vnd.collada+xml" },
			{ "daf", "application/vnd.mobius.daf" },
			{ "dataless", "application/vnd.fdsn.seed" },
			{ "davmount", "application/davmount+xml" },
			{ "dcr", "application/x-director" },
			{ "dcurl", "text/vnd.curl.dcurl" },
			{ "dd2", "application/vnd.oma.dd2+xml" },
			{ "ddd", "application/vnd.fujixerox.ddd" },
			{ "deb", "application/x-debian-package" },
			{ "def", "text/plain" },
			{ "deploy", "application/octet-stream" },
			{ "der", "application/x-x509-ca-cert" },
			{ "dfac", "application/vnd.dreamfactory" },
			{ "dic", "text/x-c" },
			{ "dir", "application/x-director" },
			{ "dis", "application/vnd.mobius.dis" },
			{ "dist", "application/octet-stream" },
			{ "distz", "application/octet-stream" },
			{ "djv", "image/vnd.djvu" },
			{ "djvu", "image/vnd.djvu" },
			{ "dll", "application/x-msdownload" },
			{ "dmg", "application/octet-stream" },
			{ "dms", "application/octet-stream" },
			{ "dna", "application/vnd.dna" },
			{ "doc", "application/msword" },
			{ "docm", "application/vnd.ms-word.document.macroenabled.12" },
			{ "docx", "application/vnd.openxmlformats-officedocument.wordprocessingml.document" },
			{ "dot", "application/msword" },
			{ "dotm", "application/vnd.ms-word.template.macroenabled.12" },
			{ "dotx", "application/vnd.openxmlformats-officedocument.wordprocessingml.template" },
			{ "dp", "application/vnd.osgi.dp" },
			{ "dpg", "application/vnd.dpgraph" },
			{ "dra", "audio/vnd.dra" },
			{ "dsc", "text/prs.lines.tag" },
			{ "dssc", "application/dssc+der" },
			{ "dtb", "application/x-dtbook+xml" },
			{ "dtd", "application/xml-dtd" },
			{ "dts", "audio/vnd.dts" },
			{ "dtshd", "audio/vnd.dts.hd" },
			{ "dump", "application/octet-stream" },
			{ "dvi", "application/x-dvi" },
			{ "dwf", "model/vnd.dwf" },
			{ "dwg", "image/vnd.dwg" },
			{ "dxf", "image/vnd.dxf" },
			{ "dxp", "application/vnd.spotfire.dxp" },
			{ "dxr", "application/x-director" },
			{ "ecelp4800", "audio/vnd.nuera.ecelp4800" },
			{ "ecelp7470", "audio/vnd.nuera.ecelp7470" },
			{ "ecelp9600", "audio/vnd.nuera.ecelp9600" },
			{ "ecma", "application/ecmascript" },
			{ "edm", "application/vnd.novadigm.edm" },
			{ "edx", "application/vnd.novadigm.edx" },
			{ "efif", "application/vnd.picsel" },
			{ "ei6", "application/vnd.pg.osasli" },
			{ "elc", "application/octet-stream" },
			{ "eml", "message/rfc822" },
			{ "emma", "application/emma+xml" },
			{ "eol", "audio/vnd.digital-winds" },
			{ "eot", "application/vnd.ms-fontobject" },
			{ "eps", "application/postscript" },
			{ "epub", "application/epub+zip" },
			{ "es3", "application/vnd.eszigno3+xml" },
			{ "esf", "application/vnd.epson.esf" },
			{ "et3", "application/vnd.eszigno3+xml" },
			{ "etx", "text/x-setext" },
			{ "exe", "application/x-msdownload" },
			{ "exi", "application/exi" },
			{ "ext", "application/vnd.novadigm.ext" },
			{ "ez", "application/andrew-inset" },
			{ "ez2", "application/vnd.ezpix-album" },
			{ "ez3", "application/vnd.ezpix-package" },
			{ "f", "text/x-fortran" },
			{ "f4v", "video/x-f4v" },
			{ "f77", "text/x-fortran" },
			{ "f90", "text/x-fortran" },
			{ "fbs", "image/vnd.fastbidsheet" },
			{ "fcs", "application/vnd.isac.fcs" },
			{ "fdf", "application/vnd.fdf" },
			{ "fe_launch", "application/vnd.denovo.fcselayout-link" },
			{ "fg5", "application/vnd.fujitsu.oasysgp" },
			{ "fgd", "application/x-director" },
			{ "fh", "image/x-freehand" },
			{ "fh4", "image/x-freehand" },
			{ "fh5", "image/x-freehand" },
			{ "fh7", "image/x-freehand" },
			{ "fhc", "image/x-freehand" },
			{ "fig", "application/x-xfig" },
			{ "fli", "video/x-fli" },
			{ "flo", "application/vnd.micrografx.flo" },
			{ "flv", "video/x-flv" },
			{ "flw", "application/vnd.kde.kivio" },
			{ "flx", "text/vnd.fmi.flexstor" },
			{ "fly", "text/vnd.fly" },
			{ "fm", "application/vnd.framemaker" },
			{ "fnc", "application/vnd.frogans.fnc" },
			{ "for", "text/x-fortran" },
			{ "fpx", "image/vnd.fpx" },
			{ "frame", "application/vnd.framemaker" },
			{ "fsc", "application/vnd.fsc.weblaunch" },
			{ "fst", "image/vnd.fst" },
			{ "ftc", "application/vnd.fluxtime.clip" },
			{ "fti", "application/vnd.anser-web-funds-transfer-initiation" },
			{ "fvt", "video/vnd.fvt" },
			{ "fxp", "application/vnd.adobe.fxp" },
			{ "fxpl", "application/vnd.adobe.fxp" },
			{ "fzs", "application/vnd.fuzzysheet" },
			{ "g2w", "application/vnd.geoplan" },
			{ "g3", "image/g3fax" },
			{ "g3w", "application/vnd.geospace" },
			{ "gac", "application/vnd.groove-account" },
			{ "gdl", "model/vnd.gdl" },
			{ "geo", "application/vnd.dynageo" },
			{ "gex", "application/vnd.geometry-explorer" },
			{ "ggb", "application/vnd.geogebra.file" },
			{ "ggt", "application/vnd.geogebra.tool" },
			{ "ghf", "application/vnd.groove-help" },
			{ "gif", "image/gif" },
			{ "gim", "application/vnd.groove-identity-message" },
			{ "gmx", "application/vnd.gmx" },
			{ "gnumeric", "application/x-gnumeric" },
			{ "gph", "application/vnd.flographit" },
			{ "gqf", "application/vnd.grafeq" },
			{ "gqs", "application/vnd.grafeq" },
			{ "gram", "application/srgs" },
			{ "gre", "application/vnd.geometry-explorer" },
			{ "grv", "application/vnd.groove-injector" },
			{ "grxml", "application/srgs+xml" },
			{ "gsf", "application/x-font-ghostscript" },
			{ "gtar", "application/x-gtar" },
			{ "gtm", "application/vnd.groove-tool-message" },
			{ "gtw", "model/vnd.gtw" },
			{ "gv", "text/vnd.graphviz" },
			{ "gxt", "application/vnd.geonext" },
			{ "h", "text/x-c" },
			{ "h261", "video/h261" },
			{ "h263", "video/h263" },
			{ "h264", "video/h264" },
			{ "hal", "application/vnd.hal+xml" },
			{ "hbci", "application/vnd.hbci" },
			{ "hdf", "application/x-hdf" },
			{ "hh", "text/x-c" },
			{ "hlp", "application/winhlp" },
			{ "hpgl", "application/vnd.hp-hpgl" },
			{ "hpid", "application/vnd.hp-hpid" },
			{ "hps", "application/vnd.hp-hps" },
			{ "hqx", "application/mac-binhex40" },
			{ "htke", "application/vnd.kenameaapp" },
			{ "htm", "text/html" },
			{ "html", "text/html" },
			{ "hvd", "application/vnd.yamaha.hv-dic" },
			{ "hvp", "application/vnd.yamaha.hv-voice" },
			{ "hvs", "application/vnd.yamaha.hv-script" },
			{ "i2g", "application/vnd.intergeo" },
			{ "icc", "application/vnd.iccprofile" },
			{ "ice", "x-conference/x-cooltalk" },
			{ "icm", "application/vnd.iccprofile" },
			{ "ico", "image/x-icon" },
			{ "ics", "text/calendar" },
			{ "ief", "image/ief" },
			{ "ifb", "text/calendar" },
			{ "ifm", "application/vnd.shana.informed.formdata" },
			{ "iges", "model/iges" },
			{ "igl", "application/vnd.igloader" },
			{ "igm", "application/vnd.insors.igm" },
			{ "igs", "model/iges" },
			{ "igx", "application/vnd.micrografx.igx" },
			{ "iif", "application/vnd.shana.informed.interchange" },
			{ "imp", "application/vnd.accpac.simply.imp" },
			{ "ims", "application/vnd.ms-ims" },
			{ "in", "text/plain" },
			{ "ipfix", "application/ipfix" },
			{ "ipk", "application/vnd.shana.informed.package" },
			{ "irm", "application/vnd.ibm.rights-management" },
			{ "irp", "application/vnd.irepository.package+xml" },
			{ "iso", "application/octet-stream" },
			{ "itp", "application/vnd.shana.informed.formtemplate" },
			{ "ivp", "application/vnd.immervision-ivp" },
			{ "ivu", "application/vnd.immervision-ivu" },
			{ "jad", "text/vnd.sun.j2me.app-descriptor" },
			{ "jam", "application/vnd.jam" },
			{ "jar", "application/java-archive" },
			{ "java", "text/x-java-source" },
			{ "jisp", "application/vnd.jisp" },
			{ "jlt", "application/vnd.hp-jlyt" },
			{ "jnlp", "application/x-java-jnlp-file" },
			{ "joda", "application/vnd.joost.joda-archive" },
			{ "jpe", "image/jpeg" },
			{ "jpeg", "image/jpeg" },
			{ "jpg", "image/jpeg" },
			{ "jpgm", "video/jpm" },
			{ "jpgv", "video/jpeg" },
			{ "jpm", "video/jpm" },
			{ "js", "application/javascript" },
			{ "json", "application/json" },
			{ "kar", "audio/midi" },
			{ "karbon", "application/vnd.kde.karbon" },
			{ "kfo", "application/vnd.kde.kformula" },
			{ "kia", "application/vnd.kidspiration" },
			{ "kml", "application/vnd.google-earth.kml+xml" },
			{ "kmz", "application/vnd.google-earth.kmz" },
			{ "kne", "application/vnd.kinar" },
			{ "knp", "application/vnd.kinar" },
			{ "kon", "application/vnd.kde.kontour" },
			{ "kpr", "application/vnd.kde.kpresenter" },
			{ "kpt", "application/vnd.kde.kpresenter" },
			{ "ksp", "application/vnd.kde.kspread" },
			{ "ktr", "application/vnd.kahootz" },
			{ "ktx", "image/ktx" },
			{ "ktz", "application/vnd.kahootz" },
			{ "kwd", "application/vnd.kde.kword" },
			{ "kwt", "application/vnd.kde.kword" },
			{ "lasxml", "application/vnd.las.las+xml" },
			{ "latex", "application/x-latex" },
			{ "lbd", "application/vnd.llamagraphics.life-balance.desktop" },
			{ "lbe", "application/vnd.llamagraphics.life-balance.exchange+xml" },
			{ "les", "application/vnd.hhe.lesson-player" },
			{ "lha", "application/octet-stream" },
			{ "link66", "application/vnd.route66.link66+xml" },
			{ "list", "text/plain" },
			{ "list3820", "application/vnd.ibm.modcap" },
			{ "listafp", "application/vnd.ibm.modcap" },
			{ "log", "text/plain" },
			{ "lostxml", "application/lost+xml" },
			{ "lrf", "application/octet-stream" },
			{ "lrm", "application/vnd.ms-lrm" },
			{ "ltf", "application/vnd.frogans.ltf" },
			{ "lvp", "audio/vnd.lucent.voice" },
			{ "lwp", "application/vnd.lotus-wordpro" },
			{ "lzh", "application/octet-stream" },
			{ "m13", "application/x-msmediaview" },
			{ "m14", "application/x-msmediaview" },
			{ "m1v", "video/mpeg" },
			{ "m21", "application/mp21" },
			{ "m2a", "audio/mpeg" },
			{ "m2v", "video/mpeg" },
			{ "m3a", "audio/mpeg" },
			{ "m3u", "audio/x-mpegurl" },
			{ "m3u8", "application/vnd.apple.mpegurl" },
			{ "m4u", "video/vnd.mpegurl" },
			{ "m4v", "video/x-m4v" },
			{ "ma", "application/mathematica" },
			{ "mads", "application/mads+xml" },
			{ "mag", "application/vnd.ecowin.chart" },
			{ "maker", "application/vnd.framemaker" },
			{ "man", "text/troff" },
			{ "mathml", "application/mathml+xml" },
			{ "mb", "application/mathematica" },
			{ "mbk", "application/vnd.mobius.mbk" },
			{ "mbox", "application/mbox" },
			{ "mc1", "application/vnd.medcalcdata" },
			{ "mcd", "application/vnd.mcd" },
			{ "mcurl", "text/vnd.curl.mcurl" },
			{ "mdb", "application/x-msaccess" },
			{ "mdi", "image/vnd.ms-modi" },
			{ "me", "text/troff" },
			{ "mesh", "model/mesh" },
			{ "meta4", "application/metalink4+xml" },
			{ "mets", "application/mets+xml" },
			{ "mfm", "application/vnd.mfmp" },
			{ "mgp", "application/vnd.osgeo.mapguide.package" },
			{ "mgz", "application/vnd.proteus.magazine" },
			{ "mid", "audio/midi" },
			{ "midi", "audio/midi" },
			{ "mif", "application/vnd.mif" },
			{ "mime", "message/rfc822" },
			{ "mj2", "video/mj2" },
			{ "mjp2", "video/mj2" },
			{ "mlp", "application/vnd.dolby.mlp" },
			{ "mmd", "application/vnd.chipnuts.karaoke-mmd" },
			{ "mmf", "application/vnd.smaf" },
			{ "mmr", "image/vnd.fujixerox.edmics-mmr" },
			{ "mny", "application/x-msmoney" },
			{ "mobi", "application/x-mobipocket-ebook" },
			{ "mods", "application/mods+xml" },
			{ "mov", "video/quicktime" },
			{ "movie", "video/x-sgi-movie" },
			{ "mp2", "audio/mpeg" },
			{ "mp21", "application/mp21" },
			{ "mp2a", "audio/mpeg" },
			{ "mp3", "audio/mpeg" },
			{ "mp4", "video/mp4" },
			{ "mp4a", "audio/mp4" },
			{ "mp4s", "application/mp4" },
			{ "mp4v", "video/mp4" },
			{ "mpc", "application/vnd.mophun.certificate" },
			{ "mpe", "video/mpeg" },
			{ "mpeg", "video/mpeg" },
			{ "mpg", "video/mpeg" },
			{ "mpg4", "video/mp4" },
			{ "mpga", "audio/mpeg" },
			{ "mpkg", "application/vnd.apple.installer+xml" },
			{ "mpm", "application/vnd.blueice.multipass" },
			{ "mpn", "application/vnd.mophun.application" },
			{ "mpp", "application/vnd.ms-project" },
			{ "mpt", "application/vnd.ms-project" },
			{ "mpy", "application/vnd.ibm.minipay" },
			{ "mqy", "application/vnd.mobius.mqy" },
			{ "mrc", "application/marc" },
			{ "mrcx", "application/marcxml+xml" },
			{ "ms", "text/troff" },
			{ "mscml", "application/mediaservercontrol+xml" },
			{ "mseed", "application/vnd.fdsn.mseed" },
			{ "mseq", "application/vnd.mseq" },
			{ "msf", "application/vnd.epson.msf" },
			{ "msh", "model/mesh" },
			{ "msi", "application/x-msdownload" },
			{ "msl", "application/vnd.mobius.msl" },
			{ "msty", "application/vnd.muvee.style" },
			{ "mts", "model/vnd.mts" },
			{ "mus", "application/vnd.musician" },
			{ "musicxml", "application/vnd.recordare.musicxml+xml" },
			{ "mvb", "application/x-msmediaview" },
			{ "mwf", "application/vnd.mfer" },
			{ "mxf", "application/mxf" },
			{ "mxl", "application/vnd.recordare.musicxml" },
			{ "mxml", "application/xv+xml" },
			{ "mxs", "application/vnd.triscape.mxs" },
			{ "mxu", "video/vnd.mpegurl" },
			{ "n3", "text/n3" },
			{ "nb", "application/mathematica" },
			{ "nbp", "application/vnd.wolfram.player" },
			{ "nc", "application/x-netcdf" },
			{ "ncx", "application/x-dtbncx+xml" },
			{ "n-gage", "application/vnd.nokia.n-gage.symbian.install" },
			{ "ngdat", "application/vnd.nokia.n-gage.data" },
			{ "nlu", "application/vnd.neurolanguage.nlu" },
			{ "nml", "application/vnd.enliven" },
			{ "nnd", "application/vnd.noblenet-directory" },
			{ "nns", "application/vnd.noblenet-sealer" },
			{ "nnw", "application/vnd.noblenet-web" },
			{ "npx", "image/vnd.net-fpx" },
			{ "nsf", "application/vnd.lotus-notes" },
			{ "oa2", "application/vnd.fujitsu.oasys2" },
			{ "oa3", "application/vnd.fujitsu.oasys3" },
			{ "oas", "application/vnd.fujitsu.oasys" },
			{ "obd", "application/x-msbinder" },
			{ "oda", "application/oda" },
			{ "odb", "application/vnd.oasis.opendocument.database" },
			{ "odc", "application/vnd.oasis.opendocument.chart" },
			{ "odf", "application/vnd.oasis.opendocument.formula" },
			{ "odft", "application/vnd.oasis.opendocument.formula-template" },
			{ "odg", "application/vnd.oasis.opendocument.graphics" },
			{ "odi", "application/vnd.oasis.opendocument.image" },
			{ "odm", "application/vnd.oasis.opendocument.text-master" },
			{ "odp", "application/vnd.oasis.opendocument.presentation" },
			{ "ods", "application/vnd.oasis.opendocument.spreadsheet" },
			{ "odt", "application/vnd.oasis.opendocument.text" },
			{ "oga", "audio/ogg" },
			{ "ogg", "audio/ogg" },
			{ "ogv", "video/ogg" },
			{ "ogx", "application/ogg" },
			{ "onepkg", "application/onenote" },
			{ "onetmp", "application/onenote" },
			{ "onetoc", "application/onenote" },
			{ "onetoc2", "application/onenote" },
			{ "opf", "application/oebps-package+xml" },
			{ "oprc", "application/vnd.palm" },
			{ "org", "application/vnd.lotus-organizer" },
			{ "osf", "application/vnd.yamaha.openscoreformat" },
			{ "osfpvg", "application/vnd.yamaha.openscoreformat.osfpvg+xml" },
			{ "otc", "application/vnd.oasis.opendocument.chart-template" },
			{ "otf", "application/x-font-otf" },
			{ "otg", "application/vnd.oasis.opendocument.graphics-template" },
			{ "oth", "application/vnd.oasis.opendocument.text-web" },
			{ "oti", "application/vnd.oasis.opendocument.image-template" },
			{ "otp", "application/vnd.oasis.opendocument.presentation-template" },
			{ "ots", "application/vnd.oasis.opendocument.spreadsheet-template" },
			{ "ott", "application/vnd.oasis.opendocument.text-template" },
			{ "oxt", "application/vnd.openofficeorg.extension" },
			{ "p", "text/x-pascal" },
			{ "p10", "application/pkcs10" },
			{ "p12", "application/x-pkcs12" },
			{ "p7b", "application/x-pkcs7-certificates" },
			{ "p7c", "application/pkcs7-mime" },
			{ "p7m", "application/pkcs7-mime" },
			{ "p7r", "application/x-pkcs7-certreqresp" },
			{ "p7s", "application/pkcs7-signature" },
			{ "p8", "application/pkcs8" },
			{ "pas", "text/x-pascal" },
			{ "paw", "application/vnd.pawaafile" },
			{ "pbd", "application/vnd.powerbuilder6" },
			{ "pbm", "image/x-portable-bitmap" },
			{ "pcf", "application/x-font-pcf" },
			{ "pcl", "application/vnd.hp-pcl" },
			{ "pclxl", "application/vnd.hp-pclxl" },
			{ "pct", "image/x-pict" },
			{ "pcurl", "application/vnd.curl.pcurl" },
			{ "pcx", "image/x-pcx" },
			{ "pdb", "application/vnd.palm" },
			{ "pdf", "application/pdf" },
			{ "pfa", "application/x-font-type1" },
			{ "pfb", "application/x-font-type1" },
			{ "pfm", "application/x-font-type1" },
			{ "pfr", "application/font-tdpfr" },
			{ "pfx", "application/x-pkcs12" },
			{ "pgm", "image/x-portable-graymap" },
			{ "pgn", "application/x-chess-pgn" },
			{ "pgp", "application/pgp-encrypted" },
			{ "pic", "image/x-pict" },
			{ "pkg", "application/octet-stream" },
			{ "pki", "application/pkixcmp" },
			{ "pkipath", "application/pkix-pkipath" },
			{ "plb", "application/vnd.3gpp.pic-bw-large" },
			{ "plc", "application/vnd.mobius.plc" },
			{ "plf", "application/vnd.pocketlearn" },
			{ "pls", "application/pls+xml" },
			{ "pml", "application/vnd.ctc-posml" },
			{ "png", "image/png" },
			{ "pnm", "image/x-portable-anymap" },
			{ "portpkg", "application/vnd.macports.portpkg" },
			{ "pot", "application/vnd.ms-powerpoint" },
			{ "potm", "application/vnd.ms-powerpoint.template.macroenabled.12" },
			{ "potx", "application/vnd.openxmlformats-officedocument.presentationml.template" },
			{ "ppam", "application/vnd.ms-powerpoint.addin.macroenabled.12" },
			{ "ppd", "application/vnd.cups-ppd" },
			{ "ppm", "image/x-portable-pixmap" },
			{ "pps", "application/vnd.ms-powerpoint" },
			{ "ppsm", "application/vnd.ms-powerpoint.slideshow.macroenabled.12" },
			{ "ppsx", "application/vnd.openxmlformats-officedocument.presentationml.slideshow" },
			{ "ppt", "application/vnd.ms-powerpoint" },
			{ "pptm", "application/vnd.ms-powerpoint.presentation.macroenabled.12" },
			{ "pptx", "application/vnd.openxmlformats-officedocument.presentationml.presentation" },
			{ "pqa", "application/vnd.palm" },
			{ "prc", "application/x-mobipocket-ebook" },
			{ "pre", "application/vnd.lotus-freelance" },
			{ "prf", "application/pics-rules" },
			{ "ps", "application/postscript" },
			{ "psb", "application/vnd.3gpp.pic-bw-small" },
			{ "psd", "image/vnd.adobe.photoshop" },
			{ "psf", "application/x-font-linux-psf" },
			{ "pskcxml", "application/pskc+xml" },
			{ "ptid", "application/vnd.pvi.ptid1" },
			{ "pub", "application/x-mspublisher" },
			{ "pvb", "application/vnd.3gpp.pic-bw-var" },
			{ "pwn", "application/vnd.3m.post-it-notes" },
			{ "pya", "audio/vnd.ms-playready.media.pya" },
			{ "pyv", "video/vnd.ms-playready.media.pyv" },
			{ "qam", "application/vnd.epson.quickanime" },
			{ "qbo", "application/vnd.intu.qbo" },
			{ "qfx", "application/vnd.intu.qfx" },
			{ "qps", "application/vnd.publishare-delta-tree" },
			{ "qt", "video/quicktime" },
			{ "qwd", "application/vnd.quark.quarkxpress" },
			{ "qwt", "application/vnd.quark.quarkxpress" },
			{ "qxb", "application/vnd.quark.quarkxpress" },
			{ "qxd", "application/vnd.quark.quarkxpress" },
			{ "qxl", "application/vnd.quark.quarkxpress" },
			{ "qxt", "application/vnd.quark.quarkxpress" },
			{ "ra", "audio/x-pn-realaudio" },
			{ "ram", "audio/x-pn-realaudio" },
			{ "rar", "application/x-rar-compressed" },
			{ "ras", "image/x-cmu-raster" },
			{ "rcprofile", "application/vnd.ipunplugged.rcprofile" },
			{ "rdf", "application/rdf+xml" },
			{ "rdz", "application/vnd.data-vision.rdz" },
			{ "rep", "application/vnd.businessobjects" },
			{ "res", "application/x-dtbresource+xml" },
			{ "rgb", "image/x-rgb" },
			{ "rif", "application/reginfo+xml" },
			{ "rip", "audio/vnd.rip" },
			{ "rl", "application/resource-lists+xml" },
			{ "rlc", "image/vnd.fujixerox.edmics-rlc" },
			{ "rld", "application/resource-lists-diff+xml" },
			{ "rm", "application/vnd.rn-realmedia" },
			{ "rmi", "audio/midi" },
			{ "rmp", "audio/x-pn-realaudio-plugin" },
			{ "rms", "application/vnd.jcp.javame.midlet-rms" },
			{ "rnc", "application/relax-ng-compact-syntax" },
			{ "roff", "text/troff" },
			{ "rp9", "application/vnd.cloanto.rp9" },
			{ "rpss", "application/vnd.nokia.radio-presets" },
			{ "rpst", "application/vnd.nokia.radio-preset" },
			{ "rq", "application/sparql-query" },
			{ "rs", "application/rls-services+xml" },
			{ "rsd", "application/rsd+xml" },
			{ "rss", "application/rss+xml" },
			{ "rtf", "application/rtf" },
			{ "rtx", "text/richtext" },
			{ "s", "text/x-asm" },
			{ "saf", "application/vnd.yamaha.smaf-audio" },
			{ "sbml", "application/sbml+xml" },
			{ "sc", "application/vnd.ibm.secure-container" },
			{ "scd", "application/x-msschedule" },
			{ "scm", "application/vnd.lotus-screencam" },
			{ "scq", "application/scvp-cv-request" },
			{ "scs", "application/scvp-cv-response" },
			{ "scurl", "text/vnd.curl.scurl" },
			{ "sda", "application/vnd.stardivision.draw" },
			{ "sdc", "application/vnd.stardivision.calc" },
			{ "sdd", "application/vnd.stardivision.impress" },
			{ "sdkd", "application/vnd.solent.sdkm+xml" },
			{ "sdkm", "application/vnd.solent.sdkm+xml" },
			{ "sdp", "application/sdp" },
			{ "sdw", "application/vnd.stardivision.writer" },
			{ "see", "application/vnd.seemail" },
			{ "seed", "application/vnd.fdsn.seed" },
			{ "sema", "application/vnd.sema" },
			{ "semd", "application/vnd.semd" },
			{ "semf", "application/vnd.semf" },
			{ "ser", "application/java-serialized-object" },
			{ "setpay", "application/set-payment-initiation" },
			{ "setreg", "application/set-registration-initiation" },
			{ "sfd-hdstx", "application/vnd.hydrostatix.sof-data" },
			{ "sfs", "application/vnd.spotfire.sfs" },
			{ "sgl", "application/vnd.stardivision.writer-global" },
			{ "sgm", "text/sgml" },
			{ "sgml", "text/sgml" },
			{ "sh", "application/x-sh" },
			{ "shar", "application/x-shar" },
			{ "shf", "application/shf+xml" },
			{ "sig", "application/pgp-signature" },
			{ "silo", "model/mesh" },
			{ "sis", "application/vnd.symbian.install" },
			{ "sisx", "application/vnd.symbian.install" },
			{ "sit", "application/x-stuffit" },
			{ "sitx", "application/x-stuffitx" },
			{ "skd", "application/vnd.koan" },
			{ "skm", "application/vnd.koan" },
			{ "skp", "application/vnd.koan" },
			{ "skt", "application/vnd.koan" },
			{ "sldm", "application/vnd.ms-powerpoint.slide.macroenabled.12" },
			{ "sldx", "application/vnd.openxmlformats-officedocument.presentationml.slide" },
			{ "slt", "application/vnd.epson.salt" },
			{ "sm", "application/vnd.stepmania.stepchart" },
			{ "smf", "application/vnd.stardivision.math" },
			{ "smi", "application/smil+xml" },
			{ "smil", "application/smil+xml" },
			{ "snd", "audio/basic" },
			{ "snf", "application/x-font-snf" },
			{ "so", "application/octet-stream" },
			{ "spc", "application/x-pkcs7-certificates" },
			{ "spf", "application/vnd.yamaha.smaf-phrase" },
			{ "spl", "application/x-futuresplash" },
			{ "spot", "text/vnd.in3d.spot" },
			{ "spp", "application/scvp-vp-response" },
			{ "spq", "application/scvp-vp-request" },
			{ "spx", "audio/ogg" },
			{ "src", "application/x-wais-source" },
			{ "sru", "application/sru+xml" },
			{ "srx", "application/sparql-results+xml" },
			{ "sse", "application/vnd.kodak-descriptor" },
			{ "ssf", "application/vnd.epson.ssf" },
			{ "ssml", "application/ssml+xml" },
			{ "st", "application/vnd.sailingtracker.track" },
			{ "stc", "application/vnd.sun.xml.calc.template" },
			{ "std", "application/vnd.sun.xml.draw.template" },
			{ "stf", "application/vnd.wt.stf" },
			{ "sti", "application/vnd.sun.xml.impress.template" },
			{ "stk", "application/hyperstudio" },
			{ "stl", "application/vnd.ms-pki.stl" },
			{ "str", "application/vnd.pg.format" },
			{ "stw", "application/vnd.sun.xml.writer.template" },
			{ "sub", "image/vnd.dvb.subtitle" },
			{ "sus", "application/vnd.sus-calendar" },
			{ "susp", "application/vnd.sus-calendar" },
			{ "sv4cpio", "application/x-sv4cpio" },
			{ "sv4crc", "application/x-sv4crc" },
			{ "svc", "application/vnd.dvb.service" },
			{ "svd", "application/vnd.svd" },
			{ "svg", "image/svg+xml" },
			{ "svgz", "image/svg+xml" },
			{ "swa", "application/x-director" },
			{ "swf", "application/x-shockwave-flash" },
			{ "swi", "application/vnd.aristanetworks.swi" },
			{ "sxc", "application/vnd.sun.xml.calc" },
			{ "sxd", "application/vnd.sun.xml.draw" },
			{ "sxg", "application/vnd.sun.xml.writer.global" },
			{ "sxi", "application/vnd.sun.xml.impress" },
			{ "sxm", "application/vnd.sun.xml.math" },
			{ "sxw", "application/vnd.sun.xml.writer" },
			{ "t", "text/troff" },
			{ "tao", "application/vnd.tao.intent-module-archive" },
			{ "tar", "application/x-tar" },
			{ "tcap", "application/vnd.3gpp2.tcap" },
			{ "tcl", "application/x-tcl" },
			{ "teacher", "application/vnd.smart.teacher" },
			{ "tei", "application/tei+xml" },
			{ "teicorpus", "application/tei+xml" },
			{ "tex", "application/x-tex" },
			{ "texi", "application/x-texinfo" },
			{ "texinfo", "application/x-texinfo" },
			{ "text", "text/plain" },
			{ "tfi", "application/thraud+xml" },
			{ "tfm", "application/x-tex-tfm" },
			{ "thmx", "application/vnd.ms-officetheme" },
			{ "tif", "image/tiff" },
			{ "tiff", "image/tiff" },
			{ "tmo", "application/vnd.tmobile-livetv" },
			{ "torrent", "application/x-bittorrent" },
			{ "tpl", "application/vnd.groove-tool-template" },
			{ "tpt", "application/vnd.trid.tpt" },
			{ "tr", "text/troff" },
			{ "tra", "application/vnd.trueapp" },
			{ "trm", "application/x-msterminal" },
			{ "tsd", "application/timestamped-data" },
			{ "tsv", "text/tab-separated-values" },
			{ "ttc", "application/x-font-ttf" },
			{ "ttf", "application/x-font-ttf" },
			{ "ttl", "text/turtle" },
			{ "twd", "application/vnd.simtech-mindmapper" },
			{ "twds", "application/vnd.simtech-mindmapper" },
			{ "txd", "application/vnd.genomatix.tuxedo" },
			{ "txf", "application/vnd.mobius.txf" },
			{ "txt", "text/plain" },
			{ "u32", "application/x-authorware-bin" },
			{ "udeb", "application/x-debian-package" },
			{ "ufd", "application/vnd.ufdl" },
			{ "ufdl", "application/vnd.ufdl" },
			{ "umj", "application/vnd.umajin" },
			{ "unityweb", "application/vnd.unity" },
			{ "uoml", "application/vnd.uoml+xml" },
			{ "uri", "text/uri-list" },
			{ "uris", "text/uri-list" },
			{ "urls", "text/uri-list" },
			{ "ustar", "application/x-ustar" },
			{ "utz", "application/vnd.uiq.theme" },
			{ "uu", "text/x-uuencode" },
			{ "uva", "audio/vnd.dece.audio" },
			{ "uvd", "application/vnd.dece.data" },
			{ "uvf", "application/vnd.dece.data" },
			{ "uvg", "image/vnd.dece.graphic" },
			{ "uvh", "video/vnd.dece.hd" },
			{ "uvi", "image/vnd.dece.graphic" },
			{ "uvm", "video/vnd.dece.mobile" },
			{ "uvp", "video/vnd.dece.pd" },
			{ "uvs", "video/vnd.dece.sd" },
			{ "uvt", "application/vnd.dece.ttml+xml" },
			{ "uvu", "video/vnd.uvvu.mp4" },
			{ "uvv", "video/vnd.dece.video" },
			{ "uvva", "audio/vnd.dece.audio" },
			{ "uvvd", "application/vnd.dece.data" },
			{ "uvvf", "application/vnd.dece.data" },
			{ "uvvg", "image/vnd.dece.graphic" },
			{ "uvvh", "video/vnd.dece.hd" },
			{ "uvvi", "image/vnd.dece.graphic" },
			{ "uvvm", "video/vnd.dece.mobile" },
			{ "uvvp", "video/vnd.dece.pd" },
			{ "uvvs", "video/vnd.dece.sd" },
			{ "uvvt", "application/vnd.dece.ttml+xml" },
			{ "uvvu", "video/vnd.uvvu.mp4" },
			{ "uvvv", "video/vnd.dece.video" },
			{ "uvvx", "application/vnd.dece.unspecified" },
			{ "uvx", "application/vnd.dece.unspecified" },
			{ "vcd", "application/x-cdlink" },
			{ "vcf", "text/x-vcard" },
			{ "vcg", "application/vnd.groove-vcard" },
			{ "vcs", "text/x-vcalendar" },
			{ "vcx", "application/vnd.vcx" },
			{ "vis", "application/vnd.visionary" },
			{ "viv", "video/vnd.vivo" },
			{ "vor", "application/vnd.stardivision.writer" },
			{ "vox", "application/x-authorware-bin" },
			{ "vrml", "model/vrml" },
			{ "vsd", "application/vnd.visio" },
			{ "vsf", "application/vnd.vsf" },
			{ "vss", "application/vnd.visio" },
			{ "vst", "application/vnd.visio" },
			{ "vsw", "application/vnd.visio" },
			{ "vtu", "model/vnd.vtu" },
			{ "vxml", "application/voicexml+xml" },
			{ "w3d", "application/x-director" },
			{ "wad", "application/x-doom" },
			{ "wav", "audio/x-wav" },
			{ "wax", "audio/x-ms-wax" },
			{ "wbmp", "image/vnd.wap.wbmp" },
			{ "wbs", "application/vnd.criticaltools.wbs+xml" },
			{ "wbxml", "application/vnd.wap.wbxml" },
			{ "wcm", "application/vnd.ms-works" },
			{ "wdb", "application/vnd.ms-works" },
			{ "weba", "audio/webm" },
			{ "webm", "video/webm" },
			{ "webp", "image/webp" },
			{ "wg", "application/vnd.pmi.widget" },
			{ "wgt", "application/widget" },
			{ "wks", "application/vnd.ms-works" },
			{ "wm", "video/x-ms-wm" },
			{ "wma", "audio/x-ms-wma" },
			{ "wmd", "application/x-ms-wmd" },
			{ "wmf", "application/x-msmetafile" },
			{ "wml", "text/vnd.wap.wml" },
			{ "wmlc", "application/vnd.wap.wmlc" },
			{ "wmls", "text/vnd.wap.wmlscript" },
			{ "wmlsc", "application/vnd.wap.wmlscriptc" },
			{ "wmv", "video/x-ms-wmv" },
			{ "wmx", "video/x-ms-wmx" },
			{ "wmz", "application/x-ms-wmz" },
			{ "woff", "application/x-font-woff" },
			{ "wpd", "application/vnd.wordperfect" },
			{ "wpl", "application/vnd.ms-wpl" },
			{ "wps", "application/vnd.ms-works" },
			{ "wqd", "application/vnd.wqd" },
			{ "wri", "application/x-mswrite" },
			{ "wrl", "model/vrml" },
			{ "wsdl", "application/wsdl+xml" },
			{ "wspolicy", "application/wspolicy+xml" },
			{ "wtb", "application/vnd.webturbo" },
			{ "wvx", "video/x-ms-wvx" },
			{ "x32", "application/x-authorware-bin" },
			{ "x3d", "application/vnd.hzn-3d-crossword" },
			{ "xap", "application/x-silverlight-app" },
			{ "xar", "application/vnd.xara" },
			{ "xbap", "application/x-ms-xbap" },
			{ "xbd", "application/vnd.fujixerox.docuworks.binder" },
			{ "xbm", "image/x-xbitmap" },
			{ "xdf", "application/xcap-diff+xml" },
			{ "xdm", "application/vnd.syncml.dm+xml" },
			{ "xdp", "application/vnd.adobe.xdp+xml" },
			{ "xdssc", "application/dssc+xml" },
			{ "xdw", "application/vnd.fujixerox.docuworks" },
			{ "xenc", "application/xenc+xml" },
			{ "xer", "application/patch-ops-error+xml" },
			{ "xfdf", "application/vnd.adobe.xfdf" },
			{ "xfdl", "application/vnd.xfdl" },
			{ "xht", "application/xhtml+xml" },
			{ "xhtml", "application/xhtml+xml" },
			{ "xhvml", "application/xv+xml" },
			{ "xif", "image/vnd.xiff" },
			{ "xla", "application/vnd.ms-excel" },
			{ "xlam", "application/vnd.ms-excel.addin.macroenabled.12" },
			{ "xlc", "application/vnd.ms-excel" },
			{ "xlm", "application/vnd.ms-excel" },
			{ "xls", "application/vnd.ms-excel" },
			{ "xlsb", "application/vnd.ms-excel.sheet.binary.macroenabled.12" },
			{ "xlsm", "application/vnd.ms-excel.sheet.macroenabled.12" },
			{ "xlsx", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" },
			{ "xlt", "application/vnd.ms-excel" },
			{ "xltm", "application/vnd.ms-excel.template.macroenabled.12" },
			{ "xltx", "application/vnd.openxmlformats-officedocument.spreadsheetml.template" },
			{ "xlw", "application/vnd.ms-excel" },
			{ "xml", "application/xml" },
			{ "xo", "application/vnd.olpc-sugar" },
			{ "xop", "application/xop+xml" },
			{ "xpi", "application/x-xpinstall" },
			{ "xpm", "image/x-xpixmap" },
			{ "xpr", "application/vnd.is-xpr" },
			{ "xps", "application/vnd.ms-xpsdocument" },
			{ "xpw", "application/vnd.intercon.formnet" },
			{ "xpx", "application/vnd.intercon.formnet" },
			{ "xsl", "application/xml" },
			{ "xslt", "application/xslt+xml" },
			{ "xsm", "application/vnd.syncml+xml" },
			{ "xspf", "application/xspf+xml" },
			{ "xul", "application/vnd.mozilla.xul+xml" },
			{ "xvm", "application/xv+xml" },
			{ "xvml", "application/xv+xml" },
			{ "xwd", "image/x-xwindowdump" },
			{ "xyz", "chemical/x-xyz" },
			{ "yang", "application/yang" },
			{ "yin", "application/yin+xml" },
			{ "zaz", "application/vnd.zzazz.deck+xml" },
			{ "zip", "application/zip" },
			{ "zir", "application/vnd.zul" },
			{ "zirz", "application/vnd.zul" },
			{ "zmm", "application/vnd.handheld-entertainment+xml" },
		};


        public static string GetMimeType(string extension)
        {
            Validator.ThrowIfNullOrEmpty("extension", extension);

            if (extension.Trim().StartsWith("."))
            {
                extension = extension.TrimStart('.');
            }

            string mime = string.Empty;
            mimeTypes.TryGetValue(extension, out mime);

            return mime;
        }

        public static string GetExtension(string mimeType)
        {
            Validator.ThrowIfNullOrEmpty("mimeType", mimeType);

            string extension = string.Empty;
            mimeTypes.TryFindKeyByValue<string, string>(mimeType, out extension);

            return extension;
        }