Not sure if i'm in the right forum, but maybe you can help me.

I have created two custom media types (one for pdf/doc/docx/etc. and one for mp4/ogg/flv/etc), and would like to have the standard upload fuctionality to map uploads to these media types.

Googling led me to create a custom mediafactory, but how do I get it to work?

I tried making a .cs file in the App_Code directory, but all that resulted in was a YSOD telling me that 'FileSystem' doesn't exist.

Heres my code

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Web;
using umbraco.BusinessLogic;
using Umbraco.Core;
using Umbraco.Core.IO;


namespace umbraco.cms.businesslogic.media
{
    public class UmbracoDocumentMediaFactory : UmbracoMediaFactory
    {
        public override string MediaTypeAlias
        {
            get { return "Document"; }
        }

        public override List Extensions
        {
            get { return new List { "pdf", "doc", "docx", "rtf", "xls", "xlsx", "ppt", "pptx" }; }
        }

        public override void DoHandleMedia(Media media, PostedMediaFile uploadedFile, User user)
        {
            // Get umbracoFile property
            var propertyId = media.getProperty(Constants.Conventions.Media.File).Id;

            // Get paths
            var destFilePath = FileSystem.GetRelativePath(propertyId, uploadedFile.FileName);
            var ext = Path.GetExtension(destFilePath).Substring(1);

            //var absoluteDestPath = HttpContext.Current.Server.MapPath(destPath);
            //var absoluteDestFilePath = HttpContext.Current.Server.MapPath(destFilePath);

            // Set media properties
            media.getProperty(Constants.Conventions.Media.File).Value = FileSystem.GetUrl(destFilePath);
            media.getProperty(Constants.Conventions.Media.Bytes).Value = uploadedFile.ContentLength;

            if (media.getProperty(Constants.Conventions.Media.Extension) != null)
                media.getProperty(Constants.Conventions.Media.Extension).Value = ext;

            // Legacy: The 'extensio' typo applied to MySQL (bug in install script, prior to v4.6.x)
            if (media.getProperty("umbracoExtensio") != null)
                media.getProperty("umbracoExtensio").Value = ext;

            FileSystem.AddFile(destFilePath, uploadedFile.InputStream, uploadedFile.ReplaceExisting);

            // Save media
            media.Save();
        }
    }
    public class UmbracoVideoMediaFactory : UmbracoMediaFactory
    {
        public override string MediaTypeAlias
        {
            get { return "Video"; }
        }

        public override List Extensions
        {
            get { return new List { "mp4", "ogg", "webm", "flv" }; }
        }

        public override void DoHandleMedia(Media media, PostedMediaFile uploadedFile, User user)
        {
            // Get umbracoFile property
            var propertyId = media.getProperty(Constants.Conventions.Media.File).Id;

            // Get paths
            var destFilePath = FileSystem.GetRelativePath(propertyId, uploadedFile.FileName);
            var ext = Path.GetExtension(destFilePath).Substring(1);

            //var absoluteDestPath = HttpContext.Current.Server.MapPath(destPath);
            //var absoluteDestFilePath = HttpContext.Current.Server.MapPath(destFilePath);

            // Set media properties
            media.getProperty(ext).Value = FileSystem.GetUrl(destFilePath);
            //media.getProperty(Constants.Conventions.Media.Bytes).Value = uploadedFile.ContentLength;

            if (media.getProperty(Constants.Conventions.Media.Extension) != null)
                media.getProperty(Constants.Conventions.Media.Extension).Value = ext;

            // Legacy: The 'extensio' typo applied to MySQL (bug in install script, prior to v4.6.x)
            if (media.getProperty("umbracoExtensio") != null)
                media.getProperty("umbracoExtensio").Value = ext;

            FileSystem.AddFile(destFilePath, uploadedFile.InputStream, uploadedFile.ReplaceExisting);

            // Save media
            media.Save();
        }
    }
}