How do you clear temporary files in an ASP.NET website project?

All you need to do is stop IIS from Services, go to c:\Windows\Microsoft.NET\Framework\v4.0.30319\ or respective Framework directory, open the Temporary ASP.NET Files and delete the folders

What happens when we delete these files? Is it safe?

Yes, it's safe to delete these, although it may force a dynamic recompilation of any .NET applications you run on the server.

For background, see the Understanding ASP.NET dynamic compilation article on MSDN.

What is a MIME type?

There are times when you would want the IIS web server to serve a file that has an extension that it does not recognize. That is, a file whose MIME type has not been defined. In such a case, IIS would return http error code, 404.3 as shown below.

HTTP Error 404.3 – Not Found
Description: The page you are requesting cannot be served because of the Multipurpose Internet Mail Extensions (MIME) map policy that is configured on the Web server. The page you requested has a file name extension that is not recognized, and therefore is not allowed.

MIME stands for Multi-purpose Internet Mail Extensions. MIME types form a standard way of classifying file types on the Internet. Internet programs such as Web servers and browsers all have a list of MIME types, so that they can transfer files of the same type in the same way, no matter what operating system they are working in.

A MIME type has two parts: a type and a subtype. They are separated by a slash (/). For example, the MIME type for Microsoft Word files is application and the subtype is msword. Together, the complete MIME type is application/msword.

Here is the list of available MIME types that you can add and configure on IIS

Hope this is useful.

List of MIME Types with Content types

There are times when you would want the IIS web server to serve a file that has an extension that it does not recognize. That is, a file whose mime type has not been defined. In such a case, IIS would return http error code, 404.3. For the web server to serve the file with that new extension, you need to create a mapping between that extension and the MIME type.

The following MIME types are some MIME types with its File Extension and Content type.

File Extension	Content type (MIME)
.323	text/h323
.aaf	application/octet-stream
.aca	application/octet-stream
.acx	application/internet-property-stream
.afm	application/octet-stream
.ai	application/postscript
.aif	audio/x-aiff
.aifc	audio/aiff
.aiff	audio/aiff
.applicati	application/x-ms-application
.art	image/x-jg
.asd	application/octet-stream
.asf	video/x-ms-asf
.asi	application/octet-stream
.asm	text/plain
.asr	video/x-ms-asf
.asx	video/x-ms-asf
.au	audio/basic
.avi	video/x-msvideo
.axs	application/olescript
.bas	text/plain
.bcpio	application/x-bcpio
.bin	application/octet-stream
.bmp	image/bmp
.c	text/plain
.cab	application/octet-stream
.cat	application/vnd.ms-pki.seccat
.cdf	application/x-cdf
.chm	application/octet-stream
.class	application/x-java-applet
.clp	application/x-msclip
.cmx	image/x-cmx
.cnf	text/plain
.cod	image/cis-cod
.cpio	application/x-cpio
.cpp	text/plain
.crd	application/x-mscardfile
.crl	application/pkix-crl
.crt	application/x-x509-ca-cert
.csh	application/x-csh
.css	text/css
.csv	application/octet-stream
.cur	application/octet-stream
.dcr	application/x-director
.deploy	application/octet-stream
.der	application/x-x509-ca-cert
.dib	image/bmp
.dir	application/x-director
.disco	text/xml
.dll	application/x-msdownload
.dlm	text/dlm
.dnl	application/x-msdownload
.doc	application/msword
.dot	application/msword
.dsp	application/octet-stream
.dtd	text/xml
.dvi	application/x-dvi
.dwf	drawing/x-dwf
.dwp	application/octet-stream
.dxr	application/x-director
.easm	application/octet-stream
.eml	message/rfc822
.emz	application/octet-stream
.eot	application/octet-stream
.eps	application/postscript
.etx	text/x-setext
.evy	application/envoy
.ex_	application/octet-stream
.exe	application/octet-stream
.fdf	application/vnd.fdf
.fif	application/fractals
.fla	application/octet-stream
.flr	x-world/x-vrml
.flv	video/x-flv
.gif	image/gif
.gtar	application/x-gtar
.gz	application/x-gzip
.h	text/plain
.hdf	application/x-hdf
.hdml	text/x-hdml
.hhc	application/x-oleobject
.hhk	application/octet-stream
.hhp	application/octet-stream
.hlp	application/winhlp
.hqx	application/mac-binhex40
.hsf	application/octet-stream
.hta	application/hta
.htc	text/x-component
.htm	text/html
.html	text/html
.htt	text/webviewhtml
.hxt	text/html
.ica	application/x-ica
.ico	image/x-icon
.ics	application/octet-stream
.ief	image/ief
.inf	application/octet-stream
.ins	application/x-internet-signup
.isp	application/x-internet-signup
.IVF	video/x-ivf
.jar	application/java-archive
.java (Disabled in IIS 7)	application/octet-stream
.jck	application/liquidmotion
.jcz	application/liquidmotion
.jfif	image/pjpeg
.jpb	application/octet-stream
.jpe	image/jpeg
.jpeg	image/jpeg
.jpg	image/jpeg
.js	application/x-javascript
.latex	application/x-latex
.lit	application/x-ms-reader
.lpk	application/octet-stream
.lsf	video/x-la-asf
.lsx	video/x-la-asf
.lzh	application/octet-stream
.m13	application/x-msmediaview
.m14	application/x-msmediaview
.m1v	video/mpeg
.m3u	audio/x-mpegurl
.man	application/x-troff-man
.manifest	application/x-ms-manifest
.map	text/plain
.mdb	application/x-msaccess
.mdp	application/octet-stream
.me	application/x-troff-me
.mht	message/rfc822
.mhtml	message/rfc822
.mid	audio/mid
.midi	audio/mid
.mix	application/octet-stream
.mmf	application/x-smaf
.mno	text/xml
.mny	application/x-msmoney
.mov	video/quicktime
.movie	video/x-sgi-movie
.mp2	video/mpeg
.mp3	audio/mpeg
.mp4	audio/mpeg
.mpa	video/mpeg
.mpe	video/mpeg
.mpeg	video/mpeg
.mpg	video/mpeg
.mpp	application/vnd.ms-project
.mpv2	video/mpeg
.ms	application/x-troff-ms
.msi	application/octet-stream
.mvb	application/x-msmediaview
.nc	application/x-netcdf
.nsc	video/x-ms-asf
.nws	message/rfc822
.ocx	application/octet-stream
.oda	application/oda
.ods	application/oleobject
.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
.pbm	image/x-portable-bitmap
.pcx	application/octet-stream
.pcz	application/octet-stream
.pdf	application/pdf
.pfb	application/octet-stream
.pfm	application/octet-stream
.pfx	application/x-pkcs12
.pgm	image/x-portable-graymap
.pko	application/vnd.ms-pki.pko
.pma	application/x-perfmon
.pmc	application/x-perfmon
.pml	application/x-perfmon
.pmr	application/x-perfmon
.pmw	application/x-perfmon
.png	image/png
.pnm	image/x-portable-anymap
.pnz	image/png
.pot	application/vnd.ms-powerpoint
.ppm	image/x-portable-pixmap
.pps	application/vnd.ms-powerpoint
.ppt	application/vnd.ms-powerpoint
.prf	application/pics-rules
.prm	application/octet-stream
.prx	application/octet-stream
.ps	application/postscript
.psd	application/octet-stream
.psm	application/octet-stream
.psp	application/octet-stream
.pub	application/x-mspublisher
.qt	video/quicktime
.qtl	application/x-quicktimeplayer
.qxd	application/octet-stream
.ra	audio/x-pn-realaudio
.ram	audio/x-pn-realaudio
.rar	application/octet-stream
.ras	image/x-cmu-raster
.rdf	application/rdf+xml
.rf	image/vnd.rn-realflash
.rgb	image/x-rgb
.rm	application/vnd.rn-realmedia
.rmi	audio/mid
.roff	application/x-troff
.rpm	audio/x-pn-realaudio-plugin
.rtf	application/rtf
.rtx	text/richtext
.scd	application/x-msschedule
.sct	text/scriptlet
.sea	application/octet-stream
.setpay	application/set-payment-initiation
.setreg	application/set-registration-initiation
.sgml	text/sgml
.sh	application/x-sh
.shar	application/x-shar
.sit	application/x-stuffit
.sldasm	application/octet-stream
.sldprt	application/octet-stream
.smd	audio/x-smd
.smi	application/octet-stream
.smx	audio/x-smd
.smz	audio/x-smd
.snd	audio/basic
.snp	application/octet-stream
.spc	application/x-pkcs7-certificates
.spl	application/futuresplash
.src	application/x-wais-source
.ssm	application/streamingmedia
.sst	application/vnd.ms-pki.certstore
.stl	application/vnd.ms-pki.stl
.sv4cpio	application/x-sv4cpio
.sv4crc	application/x-sv4crc
.svg	application/octet-stream
.swf	application/x-shockwave-flash
.t	application/x-troff
.tar	application/x-tar
.tcl	application/x-tcl
.tex	application/x-tex
.texi	application/x-texinfo
.texinfo	application/x-texinfo
.tgz	application/x-compressed
.thn	application/octet-stream
.tif	image/tiff
.tiff	image/tiff
.toc	application/octet-stream
.tr	application/x-troff
.trm	application/x-msterminal
.tsv	text/tab-separated-values
.ttf	application/octet-stream
.txt	text/plain
.u32	application/octet-stream
.uls	text/iuls
.ustar	application/x-ustar
.vbs	text/vbscript
.vcf	text/x-vcard
.vcs	text/plain
.vdx	application/vnd.visio
.vml	text/xml
.vsd	application/vnd.visio
.vss	application/vnd.visio
.vst	application/vnd.visio
.vsw	application/vnd.visio
.vsx	application/vnd.visio
.vtx	application/vnd.visio
.wav	audio/wav
.wax	audio/x-ms-wax
.wbmp	image/vnd.wap.wbmp
.wcm	application/vnd.ms-works
.wdb	application/vnd.ms-works
.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
.wmp	video/x-ms-wmp
.wmv	video/x-ms-wmv
.wmx	video/x-ms-wmx
.wmz	application/x-ms-wmz
.world	application/octet-stream
.wps	application/vnd.ms-works
.wri	application/x-mswrite
.wrl	x-world/x-vrml
.wrz	x-world/x-vrml
.wsdl	text/xml
.wvx	video/x-ms-wvx
.x	application/directx
.xaf	x-world/x-vrml
.xbm	image/x-xbitmap
.xdr	text/plain
.xla	application/vnd.ms-excel
.xlc	application/vnd.ms-excel
.xlm	application/vnd.ms-excel
.xls	application/vnd.ms-excel
.xlt	application/vnd.ms-excel
.xlw	application/vnd.ms-excel
.xml	text/xml
.xof	x-world/x-vrml
.xpm	image/x-xpixmap
.xsd	text/xml
.xsf	text/xml
.xsl	text/xml
.xslt	text/xml
.xsn	application/octet-stream
.xwd	image/x-xwindowdump
.z	application/x-compress
.zip	application/x-zip-compressed

Internet Information Services (IIS) 7.5 Express

Microsoft has released final version of it’s so called lighter version of IIS 7.5 called as “IIS 7.5 Express” which makes developers to utilize the features of IIS 7.5 in Windows XP and above Operating system environments. IIS 7.5 Express is a simple and self-contained version of IIS 7.5 that is optimized for developers. IIS 7.5 Express enhances your ability to develop and test web applications on Windows by combining the power of IIS 7.5 with the convenience of a lightweight web server like the ASP.NET Development Server (also known as Cassini). IIS 7.5 Express is included with Microsoft Web Matrix, an integrated suite of tools designed to make developing web applications on Windows simple and seamless. IIS 7.5 Express can also be used with Visual Studio 2010 as a powerful alternative to Cassini. The benefits of using IIS 7.5 Express include:

• The same web server that runs on your production server is now available on your development computer.
• Most tasks can be done without the need for administrative privileges.
• IIS 7.5 Express runs on Windows XP and all later versions of Windows.
• Many users can work independently on the same computer.

Download: IIS 7.5 Express Final

How Application Pools Works ? (IIS 6.0)

What are Application pools? How it actually Works? The concept of Application Pools has from IIS 6.0. Application pools are used to separate sets of IIS worker processes that share the same configuration and application boundaries. Application pools used to isolate our web application for better security, reliability, and availability and performance and keep running with out impacting each other . The worker process serves as the process boundary that separates each application pool so that when one worker process or application is having an issue or recycles, other applications or worker processes are not affected. One Application Pool can have multiple worker process.

When you run IIS 6.0 in worker process isolation mode, you can separate different Web applications and Web sites into groups known as Application pools. An Application pool is a group of one or more URLs that are served by a worker process or set of worker processes. Any Web directory or virtual directory can be assigned to an application pool. Each application pool is given its own set of server resources. That way, if a Web site crashes, it won’t effect sites in other application pools.

A classic example of this is a Web site with a memory leak. If all of the Web sites hosted on a particular server were to share system resources, and one of the Web sites had a memory leak, it could potentially take memory away from the other hosted sites. If the leaky site were in its own application pool though, the memory leak would not effect any other site because each application pool has its own server resources (including memory).

Main idea behind application pools are
1. Isolation of Different Web Application
2. Individual worker process for different web application
3. More reliably web application
4. Better Performance

For more information check this URL from MSDN.

Hope this is useful