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• OpenGL depth texture wrong

  - by CoffeeandCode

  I have been writing a game engine for a while now and have decided to reconstruct my positions from depth... but how I read the depth seems to be wrong :/ What is wrong in my rendering? How I init my depth texture in the FBO gl::BindTexture(gl::TEXTURE_2D, this->textures[0]); // Depth gl::TexImage2D( gl::TEXTURE_2D, 0, gl::DEPTH32F_STENCIL8, width, height, 0, gl::DEPTH_STENCIL, gl::FLOAT_32_UNSIGNED_INT_24_8_REV, nullptr ); gl::TexParameterf(gl::TEXTURE_2D, gl::TEXTURE_MAG_FILTER, gl::NEAREST); gl::TexParameterf(gl::TEXTURE_2D, gl::TEXTURE_MIN_FILTER, gl::NEAREST); gl::TexParameterf(gl::TEXTURE_2D, gl::TEXTURE_WRAP_S, gl::CLAMP_TO_EDGE); gl::TexParameterf(gl::TEXTURE_2D, gl::TEXTURE_WRAP_T, gl::CLAMP_TO_EDGE); gl::FramebufferTexture2D( gl::FRAMEBUFFER, gl::DEPTH_STENCIL_ATTACHMENT, gl::TEXTURE_2D, this->textures[0], 0 ); Linear depth readings in my shader Vertex #version 150 layout(location = 0) in vec3 position; layout(location = 1) in vec2 uv; out vec2 uv_f; void main(){ uv_f = uv; gl_Position = vec4(position, 1.0); } Fragment (where the issue probably is) #version 150\n uniform sampler2D depth_texture; in vec2 uv_f; out vec4 Screen; void main(){ float n = 0.00001; float f = 100.0; float z = texture(depth_texture, uv_f).x; float linear_depth = (n * z)/(f - z * (f - n)); Screen = vec4(linear_depth); // It ISN'T because I don't separate alpha } When Rendered so gamedev.stackexchange, what's wrong with my rendering/glsl?

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• can't send with postfix but I can whith one user

  - by CvR_XX

  I have a postfix and dovecot server but when i try to send an email i get an time -out. Im trying to send with the email [email protected]. A telnet session isn't helping much ether. I get a blank screen. Local it's working fine. My smtp service is running on treadity.com:25. The strange thing is that the logs are completely empty with any info regarding sending emails. Receiving is working alright. Another strange thing is that i've send some message's and that it worked. But that is only with one email. I can still send from that account but other emails are failing any idea's? config file: # See /usr/share/postfix/main.cf.dist for a commented, more complete version # Debian specific: Specifying a file name will cause the first # line of that file to be used as the name. The Debian default # is /etc/mailname. #myorigin = /etc/mailname smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU) biff = no # appending .domain is the MUA's job. append_dot_mydomain = no # Uncomment the next line to generate "delayed mail" warnings #delay_warning_time = 4h readme_directory = no # TLS parameters #smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem #smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key #smtpd_use_tls=yes #smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache #smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache smtpd_tls_cert_file=/etc/ssl/certs/dovecot.pem smtpd_tls_key_file=/etc/ssl/private/dovecot.pem smtpd_use_tls=yes # See /usr/share/postfix/main.cf.dist for a commented, more complete version # Debian specific: Specifying a file name will cause the first # line of that file to be used as the name. The Debian default # is /etc/mailname. #myorigin = /etc/mailname smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU) biff = no # appending .domain is the MUA's job. append_dot_mydomain = no # Uncomment the next line to generate "delayed mail" warnings #delay_warning_time = 4h readme_directory = no # TLS parameters #smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem #smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key #smtpd_use_tls=yes #smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache #smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache smtpd_tls_cert_file=/etc/ssl/certs/dovecot.pem smtpd_tls_key_file=/etc/ssl/private/dovecot.pem smtpd_use_tls=yes # See /usr/share/postfix/main.cf.dist for a commented, more complete version # Debian specific: Specifying a file name will cause the first # line of that file to be used as the name. The Debian default # is /etc/mailname. #myorigin = /etc/mailname smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU) biff = no # appending .domain is the MUA's job. append_dot_mydomain = no # Uncomment the next line to generate "delayed mail" warnings #delay_warning_time = 4h readme_directory = no # TLS parameters #smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem #smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key #smtpd_use_tls=yes #smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache #smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache smtpd_tls_cert_file=/etc/ssl/certs/dovecot.pem smtpd_tls_key_file=/etc/ssl/private/dovecot.pem smtpd_use_tls=yes smtpd_tls_auth_only = yes #Enabling SMTP for authenticated users, and handing off authentication to Dovecot smtpd_sasl_type = dovecot smtpd_sasl_path = private/auth smtpd_sasl_auth_enable = yes 1,1 Top

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• Windows Media Center won't Play MSN Video Player

  - by Chris Spicer

  My install of Windows Media Center won't play MSN Video Player videos. They appear in the main guide, but when I click on them, nothing happens. If I look on the main menu, I don't have any icons for MSN Video player there. People have suggested I try downloading updates, but that makes no difference. I have internet connectivity. My region is set to the UK (which is where I am). If I navigate to the MSN Video Player using Internet Explorer, the videos play fine. The machine is an Acer Revo RL100, running Windows 7 64-bit. Does anyone have a solution for this? Any help would be gratefully received.

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• Plesk Subdomain folder group and permission problem

  - by Jake

  I am working on a dedicated server from some web host. In Plesk 9.5, after creating a subdomain sub.domain.com, with login using main account, plesk automatically creates a folder domain.com/subdomain/sub with user and group of root I want to upload some files (the framework api) in domain.com/subdomain/sub itself instead of domain.com/subdomain/sub/httpdocs but I can't. domain.com/subdomain/sub/httpdocs has user and group of [main account_user] and psaserv respectively Is there a way to modify the user/group of domain.com/subdomain/sub from plesk so that I can upload files inside it? Otherwise, what is the next best solution?

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• Dell PowerEdge 6850 Degraded HDD

  - by Matt

  Good Morning, We have a dell power edge 6850 with a degraded drive in the RAID array. I have never had to recover such an issue, so any help or advice would be welcome. Basically it hasn't affected the server at an operating system level, but has slowed down performance, I have a replacement drive in hand but as this is our main database server I want to proceed with extreme caution. My options as I see them are - Can I just hot swap the degraded drive with the new one and the data will automatically re-sync and we are all back to normal presumably this is dependant on the current raid configuration? reading various comments on-line I may need to re-configure the RAID array and re-build the broken drive? This screams disaster to me with the main worry being that I wipe any other data. Option 1 would of course make my day. Thanks in advance

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• vbscript help needed [migrated]

  - by Romeo

  I am trying to move a group of files with in a group of folders named recup_dir.1 through recup_dir.535 into a single folder so that all the files will be out of the folders and just in the single folder. I know I will need to use a loop to move the files and probably concatenation to go from recup_dir.1 to recup_dir.535 but I just am not that skilled in programming please help!! I just want it to automate the copying and moving of the files rather than do it manually.

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• Nginx, logrotate and empty files

  - by tzulberti

  I have a problem with nginx/logrotate. The problems is that nginx is logging access to 2 files (main and data). I have the following contrab setting: 0 * * * * /usr/sbin/logrotate -f /home/orwell/orwell-setup/bin/logrotate-nginx And the file "logrotate-nginx" has the following content: /tmp/data.log { rotate 90 daily missingok notifempty size 1 sharedscripts postrotate [ ! -f /tmp/nginx.pid ] || kill -USR1 `cat /tmp/nginx.pid` MORE THINGS endscript } /tmp/main.log { rotate 90 daily missingok notifempty size 1 sharedscripts postrotate [ ! -f /tmp/nginx.pid ] || kill -USR1 `cat /tmp/nginx.pid` MORE THINGS endscript } The work is done in the two files, but there is a problem that nginx stops logging into those files. Both files are created, but they are empty. Any ideas why nginx stop logging info to both files?

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• zero downtime during database scheme upgrade on SQL 2008

  - by eject

  I have web application on IIS7 with SQL server 2008 as RDBMS. Need get 0 downtime during future upgrades of ASP.NET code and DB schema as well. I need to get right scenario for this. I have 2 web servers and 2 sql servers and one http load balancer whcih allows to switch web backend server for web requests. Main goal is to make 1st web server and DB server up and running, update code and db schema on 2nd server and then switch all the requests to 2nd server and then main problem - how to copy data from 1st database 2nd (which was changed during upgrade).

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• Multi-Document TOC showing in wrong order

  - by Jeremy DeStefano

  I had a large document that was having formatting issues, so I split it into 2 files. Chapters 1-7 are in the main doc with the TOC and a second doc has chapters 8-12. I have the following: {TOC \O "1-3" \H \Z \U} {RD \f "MCDPS Training Manual Part2.docx"} The TOC is created and has entries from both documents, however its showing the entries from Chapter 8-11 first and then Chapter 1-7. I've read that it should list them based on page numbers, but its not. Chapter 8 starts at page 121, yet its listing it first. How can I get it to show the TOC from the main doc first and then the RD?

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• How can I render a semi transparent model with OpenGL correctly?

  - by phobitor

  I'm using OpenGL ES 2 and I want to render a simple model with some level of transparency. I'm just starting out with shaders, and I wrote a simple diffuse shader for the model without any issues but I don't know how to add transparency to it. I tried to set my fragment shader's output (gl_FragColor) to a non opaque alpha value but the results weren't too great. It sort of works, but it looks like certain model triangles are only rendered based on the camera position... It's really hard to describe what's wrong so please watch this short video I recorded: http://www.youtube.com/watch?v=s0JqA0rZabE I thought this was a depth testing issue so I tried playing around with enabling/disabling depth testing and back face culling. Enabling back face culling changes the output slightly but the problem in the video is still there. Enabling/disabling depth testing doesn't seem to do anything. Could anyone explain what I'm seeing and how I can add some simple transparency to my model with the shader? I'm not looking for advanced order independent transparency implementations. edit: Vertex Shader: // color varying for fragment shader varying mediump vec3 LightIntensity; varying highp vec3 VertexInModelSpace; void main() { // vec4 LightPosition = vec4(0.0, 0.0, 0.0, 1.0); vec3 LightColor = vec3(1.0, 1.0, 1.0); vec3 DiffuseColor = vec3(1.0, 0.25, 0.0); // find the vector from the given vertex to the light source vec4 vertexInWorldSpace = gl_ModelViewMatrix * vec4(gl_Vertex); vec3 normalInWorldSpace = normalize(gl_NormalMatrix * gl_Normal); vec3 lightDirn = normalize(vec3(LightPosition-vertexInWorldSpace)); // save vertexInWorldSpace VertexInModelSpace = vec3(gl_Vertex); // calculate light intensity LightIntensity = LightColor * DiffuseColor * max(dot(lightDirn,normalInWorldSpace),0.0); // calculate projected vertex position gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex; } Fragment Shader: // varying to define color varying vec3 LightIntensity; varying vec3 VertexInModelSpace; void main() { gl_FragColor = vec4(LightIntensity,0.5); }

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• mod_rewrite and SEO friendliness

  - by John Doe

  My website has an atypical structure and I'm not sure if this could create problems in the long run, specially for SEO positioning purposes. I have a unique, large PHP script, and I use the Apache module mod_rewrite in the .htaccess file to create friendly URLs, for example: RewriteRule ^$ /index.php?section=Main RewriteRule ^createArticle$ /index.php?section=Main&view=CreateArticle RewriteRule ^configuration$ /index.php?section=Configuration RewriteRule ^article/([0-9]{1,10})$ /index.php?section=Article&view=Default&id=$1 RewriteRule ^deleteArticle/([0-9]{1,10})$ /index.php?section=Article&view=Delete&id=$1 RewriteRule ^reportArticle/([0-9]{1,10})$ /index.php?section=Article&view=Report&id=$1 RewriteRule ^logIn$ /index.php?section=Authentication ... So, www.example.com/index.php?section=Article&view=Default&id=105 would become www.example.com/article/105. The only real physical file is index.php, in which the parameters of the URL queried is processed and the corresponding result is outputted. My question is, do the crawling robots (e.g. Googlebot) recognize these links? Do they index the resulting HTML outputted by index.php with the specified parameters as if it was a actual HTML file? Also, would this become a problem when creating a Sitemap?

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• Squid stale-while-revalidate not working when max-age=0

  - by Wiliam

  Squid 2.7 always reaches backend, expected is to reach backend using stale-while-revalidate only when cache expires, not when client triggers max-age=0. Script: <?php header('Cache-Control: public, max-age=10, stale-if-error=200, stale-while-revalidate=500'); header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT"); sleep(2); die("OK"); And squid config: # http_port public_ip:port accel defaultsite= default hostname, if not provided http_port 80 accel defaultsite=mydomain.com # IP and port of your main application server (or multiple) cache_peer 127.0.0.1 parent 8000 0 no-query allow-miss originserver name=main # Do not tell the world that which squid version we're running httpd_suppress_version_string on # Remove the Caching Control header for upstream servers header_access Cache-Control deny all #header_access Last-Modified deny all # log all incoming traffic in Apache format logformat combined %>a %ui %un [%tl] "%rm %ru HTTP/%rv" %Hs %<st "%{Referer}>h" "%{User-Agent}>h" %Ss:%Sh access_log /usr/local/squid/var/logs/squid.log combined all cache_effective_user squid refresh_pattern . 10080 90% 999999 ignore-no-cache override-expire ignore-private icp_port 0

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• Cross-match a number of worksheets to one master worksheet

  - by Carter

  Hopefully the title is not too confusing. Basically, I have a master list of addresses and those addresses are listed in multiple columns (Column A - street number, Column B - street name, Column C - street type etc) and I get a another set of addresses on a daily basis with the same address formatting. What I need to do is cross-match the daily changing list of addresses to the first list to remove any matching entries. So, for example, if the first list has 123 Main St on it, I have to ensure that there are no entries of 123 Main St on any subsequent daily lists. I'm using one address as an example but the lists contain upwards of 10000 addresses that have to be cross matched. I don't need them flagged or highlighted, just deleted from the daily lists (though if they have to be flagged or highlighted, I could work with that) Any help here would be much appreciated.

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• Splitting Pygame functionality between classes or modules?

  - by sec_goat

  I am attempting to make my pygame application more modular so that different functionalities are split up into different classes and modules. I am having some trouble getting pygame to allow me to draw or load images in secondary classes when the display has been set and pygame.init() has been done in my main class. I have typically used C# and XNA to accomplish this sort of behavior, but this time I need to use python. How do I init pygame in class1, then create an instance of class2 which loads and converts() images. I have tried pygame.init() in class 2 but then it tells me no display mode has been set, when it has been set in class1. I am under the impression i do not wnat to create multiple pygame.displays as that gets problematic I am probably missing something pythonic and simple but I am not sure what. How do I create a Display class, init python and then have other modules do my work like loading images, fonts etc.? here is the simplest version of what I am doing: class1: def __init__(self): self.screen = pygame.display.set_mode((600,400)) self.imageLoader = class2() class2: def __init__(self): self.images = ['list of images'] def load_images(): self.images = os.listdir('./images/') #get all images in the images directory for img in self.images: #read all images in the directory and load them into pygame new_img = pygame.image.load(os.path.join('images', img)).convert() scale_img = pygame.transform.scale(new_img, (pygame.display.Info().current_w, pygame.display.Info().current_h)) self.images.append(scale_img) if __name__ == "__main__": c1 = class1() c1.imageLoader.load_images() Of course when it tries to load an convert the images it tells me pygame has not been initialized, so i throw in a pygame.init() in class2 ( i have heard it is safe to init multiple times) and then the error goes to pygame.error: No video mode has been set

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• Route eth0 to internet traffic and eth1 to local traffic

  - by Romain Caire

  How can I route all my internet traffic on eth0 (everything except 192.168.1.0/24) and route my local traffic through eth1 (192.168.1.0)? Here is my attempt : # Flush ALL THE THINGS. ip route flush table main # Restore the main table. I flushed it because OpenVPN does weird things to it. ip route add 127.0.0.0/8 via 127.0.0.1 dev lo ip route add 0.0.0.0/0 via 164.67.195.1 ip route add 192.168.1.0/24 via 192.168.1.1 ip route flush cache

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• Is there any way to get a windows application to always start on "Monitor n"?

  - by Nifle

  The specific app I'm having a problem with is Firefox but I'd like a generic solution. I have 2 monitors the larger is my main monitor. I would like to be able to tell windows that every time I start app 'X' I want it too start in my main monitor and ideally have it start app 'Y' in my secondary monitor. And I want it to do this regardless of witch monitor the app was when it was last used. Does anyone know of a tool or windows-tweak to make this possible?

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• Setting up Multiple Routers (as Hardware Firewalls) behind a Home Router

  - by Synetech

  I’ve currently got one computer behind a router with built-in firewall functionality, connected to a home cable-modem that has a single Ethernet port and one IP. I’m going to have to set up another computer for the rest of the family to use which of course will need to be connected to the Internet, probably wirelessly since the modem is in my room and the new system would not be. What I would like to do is to get two more small routers with firewall capability and connect each computer to a router, which would in turn connect to the main router which connects to the cable-modem. That way, both systems have a hardware firewall protecting them (particularly the wireless system) and the burden of blocking would be reduced on both the computer CPUs and the main router because the secondary routers would handle some of the workload. I’m trying to find out about the complexities inherent in this design and how I could set it up to work, specifically the IP handling and NAT aspect. Thanks a lot.

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• Cheap server stress testing

  - by acrosman

  The IT department of the nonprofit organization I work for recently got a new virtual server running CentOS (with Apache and PHP 5), which is supposed to host our website. During the process of setting up the server I discovered that the slightest use of the new machine caused major performance problems (I couldn't extract tarballs without bringing it to a halt). After several weeks of casting about in the dark by tech support, it now appears to be working fine, but I'm still nervous about moving the main site there. I have no budget to work with (so no software or services that require money), although due to recent cut backs I have several older desktops that I could use if it helps. The site doesn't need to withstand massive amounts of traffic (it's a Drupal site just a few thousand visitors a day), but I would like to put it through a bit of it paces before moving the main site over. What are cheap tools that I can use to get a sense if the server can withstand even low levels of traffic? I'm not looking to test the site itself yet, just fundamental operation of the server.

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• Outlook Express hangs when selecting multiple emails

  - by Javier Badia

  I'm using Outlook Express (6, I think) on Windows XP. Lately, it has been hanging. Sometimes this happens at startup (right after the main window with all the panes loads) and sometimes when selecting many emails (sometimes as low as three emails at once, sometimes at ten, it's not a fixed number). When this happens, msimn.exe starts to use 98-100% CPU and RAM usage shoots up very quickly, reaching hundreds of megabytes in half a minute. The message pane goes gray instead of showing the message contents. As I said, this sometimes happens right after the main window loads, sometimes when selecting many emails at once. I tried backing up everything, deleting the identities, creating a new one and restoring, but this still happens.

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• Host forwarding fails, server is up, domain name tests ambiguous

  - by jayunit100

  I have a domain name registered with http://www.registryrocket.com/ The "main" site, which is called rudolfcode.net, is registered under godaddy, and forwards to a heroku site (rudolfcode.herokuapp.com). I have found that the main site, rudolfcode.net works, but the hostgator forwarding has stopped working (firefox simply fails when you point to http://www.rudolflabs.com, which is the domain name registered by hostgator). How can I debug this issue ? Finally, I have tried to run some DNS tests, and here are the results : Im not sure what the failures mean .... But Im pretty sure that "Conecting to WWW Home Page" failed is a pretty bad sign ! Thanks.

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• Accessing Controls Within A Gridview

  - by Bunch

  Sometimes you need to access a control within a GridView, but it isn’t quite as straight forward as just using FindControl to grab the control like you can in a FormView. Since the GridView builds multiple rows the key is to specify the row. In this example there is a GridView with a control for a player’s errors. If the errors is greater than 9 the GridView should display the control (lblErrors) in red so it stands out. Here is the GridView: <asp:GridView ID="gvFielding" runat="server" DataSourceID="sqlFielding" DataKeyNames="PlayerID" AutoGenerateColumns="false" >     <Columns>         <asp:BoundField DataField="PlayerName" HeaderText="Player Name" />         <asp:BoundField DataField="PlayerNumber" HeaderText="Player Number" />         <asp:TemplateField HeaderText="Errors">             <ItemTemplate>                 <asp:Label ID="lblErrors" runat="server" Text='<%# EVAL("Errors") %>'  />             </ItemTemplate>         </asp:TemplateField>     </Columns> </asp:GridView> In the code behind you can add the code to change the label’s ForeColor property to red based on the amount of errors. In this case 10 or more errors triggers the color change. Protected Sub gvFielding_DataBound(ByVal sender As Object, ByVal e As System.EventArgs) Handles gvFielding.DataBound     Dim errorLabel As Label     Dim errors As Integer     Dim i As Integer = 0     For Each row As GridViewRow In gvFielding.Rows         errorLabel = gvFielding.Rows(i).FindControl("lblErrors")         If Not errorLabel.Text = Nothing Then             Integer.TryParse(errorLabel.Text, errors)             If errors > 9 Then                 errorLabel.ForeColor = Drawing.Color.Red             End If         End If         i += 1     Next End Sub The main points in the DataBound sub is use a For Each statement to loop through the rows and to increment the variable i so you loop through every row. That way you check each one and if the value is greater than 9 the label changes to red. The If Not errorLabel.Text = Nothing line is there as a check in case no data comes back at all for Errors. Technorati Tags: GridView,ASP.Net,VB.Net

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• Any advice for dynamic music control?

  - by Assembler

  I would like to be able to dynamically progress the score, and affect the volume levels of separate channels within the music. How could I do this? From my experience with mod music (olden days Amiga music, Mod Tracker, Scream Tracker, Fast Tracker II, Impulse Tracker etc etc), I believe this is the best way to tackle the problem, to allow the music to move from one loop to another, without anything mixed down. I want to do this in AS3, and am considering pulling apart Flod to make this happen

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• Use crontab scheduling java application problem occurs

  - by koma

  The main method to start the java application. The main method initialize the log, and then determine whether the process is running. Every 10 minutes, scheduled to run through the linux crontab. Able to determine that the 10 minutes of this program must end. Under normal circumstances, will print the following log The beginning of the implementation of 10 minutes The end of the 10 minutes of normal The beginning of the implementation of 20 minutes The end of the 20 minutes of normal The beginning of the implementation of 30 minutes The end of the 30 minutes of normal ..... But now this situation: The beginning of the implementation of 10 minutes The end of the 10 minutes of normal Execution starts in 30 minutes, but detected already have a process in operation, the program exits. Start the execution of 40 points, but detected already have a process in operation, the program exits. ..... Very strange 20-minute log does not print, but the 20-minute program has been launched by the ps-ef | grep java view java thread, found in a 20-minute thread is locked. But why not see the log Check the linux dispatch log, not see scheduling a 20-minute log.

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• Windows script to create directories of 3,000 files

  - by uhpl1

  We have some email archiving that is dumping all the emails into a directory. Because of some performance reasons with the server, I want to setup an automated task that will run a script once a day and if there is more than 3,000 (or whatever number) of files in the main directory, create a new directory with the date and move all the main directory files into it. I'm sure someone has already written something similar, so if anyone could point me at it that would be great. Batch file or Powershell would both be fine.

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• Resource Acquisition is Initialization in C#

  - by codeWithoutFear

  Resource Acquisition Is Initialization (RAII) is a pattern I grew to love when working in C++.  It is perfectly suited for resource management such as matching all those pesky new's and delete's.  One of my goals was to limit the explicit deallocation statements I had to write.  Often these statements became victims of run-time control flow changes (i.e. exceptions, unhappy path) or development-time code refactoring. The beauty of RAII is realized by tying your resource creation (acquisition) to the construction (initialization) of a class instance.  Then bind the resource deallocation to the destruction of that instance.  That is well and good in a language with strong destructor semantics like C++, but languages like C# that run on garbage-collecting runtimes don't provide the same instance lifetime guarantees. Here is a class and sample that combines a few features of C# to provide an RAII-like solution: using System; namespace RAII { public class DisposableDelegate : IDisposable { private Action dispose; public DisposableDelegate(Action dispose) { if (dispose == null) { throw new ArgumentNullException("dispose"); } this.dispose = dispose; } public void Dispose() { if (this.dispose != null) { Action d = this.dispose; this.dispose = null; d(); } } } class Program { static void Main(string[] args) { Console.Out.WriteLine("Some resource allocated here."); using (new DisposableDelegate(() => Console.Out.WriteLine("Resource deallocated here."))) { Console.Out.WriteLine("Resource used here."); throw new InvalidOperationException("Test for resource leaks."); } } } } The output of this program is: Some resource allocated here. Resource used here. Unhandled Exception: System.InvalidOperationException: Test for resource leaks. at RAII.Program.Main(String[] args) in c:\Dev\RAII\RAII\Program.cs:line 40 Resource deallocated here. Code without fear! --Don

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