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  • How do you pass a generic delegate argument to a method in .NET 2.0 - UPDATED

    - by Seth Spearman
    Hello, I have a class with a delegate declaration as follows... Public Class MyClass Public Delegate Function Getter(Of TResult)() As TResult ''#the following code works. Public Shared Sub MyMethod(ByVal g As Getter(Of Boolean)) ''#do stuff End Sub End Class However, I do not want to explicitly type the Getter delegate in the Method call. Why can I not declare the parameter as follows... ... (ByVal g As Getter(Of TResult)) Is there a way to do it? My end goal was to be able to set a delegate for property setters and getters in the called class. But my reading indicates you can't do that. So I put setter and getter methods in that class and then I want the calling class to set the delegate argument and then invoke. Is there a best practice for doing this. I realize in the above example that I can set set the delegate variable from the calling class...but I am trying to create a singleton with tight encapsulation. For the record, I can't use any of the new delegate types declared in .net35. Answers in C# are welcome. Any thoughts? Seth

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  • How do you pass a generic delegate argument to a method in .NET 2.0

    - by Seth Spearman
    Hello, I have a class with a delegate declaration as follows... Public Class MyClass Public Delegate Function Getter(Of TResult)() As TResult 'the following code works. Public Shared Sub MyMethod(ByVal g As Getter(Of Boolean)) 'do stuff End Sub End Class However, I do not want to explicitly type the Getter delegate in the Method call. Why can I not declare the parameter as follows... ... (ByVal g As Getter(Of TResult)) Is there a way to do it? My end goal was to be able to set a delegate for property setters and getters in the called class. But my reading indicates you can't do that. So I put setter and getter methods in that class and then I want the calling class to set the delegate argument and then invoke. Is there a best practice for doing this. I realize in the above example that I can set set the delegate variable from the calling class...but I am trying to create a singleton with tight encapsulation. For the record, I can't use any of the new delegate types declared in .net35. Answers in C# are welcome. Any thoughts? Seth

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  • How do you create a generic method in a class?

    - by Seth Spearman
    Hello, I am really trying to follow the DRY principle. I have a sub that looks like this? Private Sub DoSupplyModel OutputLine("ITEM SUMMARIES") Dim ItemSumms As New SupplyModel.ItemSummaries(_currentSupplyModel, _excelRows) ItemSumms.FillRows() OutputLine("") OutputLine("NUMBERED INVENTORIES") Dim numInvs As New SupplyModel.NumberedInventories(_currentSupplyModel, _excelRows) numInvs.FillRows() OutputLine("") End Sub I would like to collapse these into a single method using generics. For the record, ItemSummaries and NumberedInventories are both derived from the same base class DataBuilderBase. I can't figure out the syntax that will allow me to do ItemSumms.FillRows and numInvs.FillRows in the method. FillRows is declared as Public Overridable Sub FillRows in the base class. Thanks in advance. EDIT Here is my end result Private Sub DoSupplyModels() DoSupplyModelType("ITEM SUMMARIES",New DataBlocks(_currentSupplyModel,_excelRows) DoSupplyModelType("DATA BLOCKS",New DataBlocks(_currentSupplyModel,_excelRows) End Sub Private Sub DoSupplyModelType(ByVal outputDescription As String, ByVal type As DataBuilderBase) OutputLine(outputDescription) type.FillRows() OutputLine("") End Sub But to answer my own question...I could have done this... Private Sub DoSupplyModels() DoSupplyModelType(Of Projections)("ITEM SUMMARIES") DoSupplyModelType(Of DataBlocks)("DATA BLOCKS") End Sub Private Sub DoSupplyModelType(Of T as DataBuilderBase)(ByVal outputDescription As String, ByVal type As T) OutputLine(outputDescription) dim type as New T(_currentSupplyModel,_excelRows) type.FillRows() OutputLine("") End Sub Is that right? Does the New T() work? Seth

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  • Design Question - how do you break the dependency between classes using an interface?

    - by Seth Spearman
    Hello, I apologize in advance but this will be a long question. I'm stuck. I am trying to learn unit testing, C#, and design patterns - all at once. (Maybe that's my problem.) As such I am reading the Art of Unit Testing (Osherove), and Clean Code (Martin), and Head First Design Patterns (O'Reilly). I am just now beginning to understand delegates and events (which you would see if you were to troll my SO questions of recent). I still don't quite get lambdas. To contextualize all of this I have given myself a learning project I am calling goAlarms. I have an Alarm class with members you'd expect (NextAlarmTime, Name, AlarmGroup, Event Trigger etc.) I wanted the "Timer" of the alarm to be extensible so I created an IAlarmScheduler interface as follows... public interface AlarmScheduler { Dictionary<string,Alarm> AlarmList { get; } void Startup(); void Shutdown(); void AddTrigger(string triggerName, string groupName, Alarm alarm); void RemoveTrigger(string triggerName); void PauseTrigger(string triggerName); void ResumeTrigger(string triggerName); void PauseTriggerGroup(string groupName); void ResumeTriggerGroup(string groupName); void SetSnoozeTrigger(string triggerName, int duration); void SetNextOccurrence (string triggerName, DateTime nextOccurrence); } This IAlarmScheduler interface define a component that will RAISE an alarm (Trigger) which will bubble up to my Alarm class and raise the Trigger Event of the alarm itself. It is essentially the "Timer" component. I have found that the Quartz.net component is perfectly suited for this so I have created a QuartzAlarmScheduler class which implements IAlarmScheduler. All that is fine. My problem is that the Alarm class is abstract and I want to create a lot of different KINDS of alarm. For example, I already have a Heartbeat alarm (triggered every (int) interval of minutes), AppointmentAlarm (triggered on set date and time), Daily Alarm (triggered every day at X) and perhaps others. And Quartz.NET is perfectly suited to handle this. My problem is a design problem. I want to be able to instantiate an alarm of any kind without my Alarm class (or any derived classes) knowing anything about Quartz. The problem is that Quartz has awesome factories that return just the right setup for the Triggers that will be needed by my Alarm classes. So, for example, I can get a Quartz trigger by using TriggerUtils.MakeMinutelyTrigger to create a trigger for the heartbeat alarm described above. Or TriggerUtils.MakeDailyTrigger for the daily alarm. I guess I could sum it up this way. Indirectly or directly I want my alarm classes to be able to consume the TriggerUtils.Make* classes without knowing anything about them. I know that is a contradiction, but that is why I am asking the question. I thought about putting a delegate field into the alarm which would be assigned one of these Make method but by doing that I am creating a hard dependency between alarm and Quartz which I want to avoid for both unit testing purposes and design purposes. I thought of using a switch for the type in QuartzAlarmScheduler per here but I know it is bad design and I am trying to learn good design. If I may editorialize a bit. I've decided that coding (predefined) classes is easy. Design is HARD...in fact, really hard and I am really fighting feeling stupid right now. I guess I want to know if you really smart people took a while to really understand and master this stuff or should I feel stupid (as I do) because I haven't grasped it better in the couple of weeks/months I have been studying. You guys are awesome and thanks in advance for your answers. Seth

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  • Yes WinRT Devices Have a Desktop&hellip;But Not For Us

    - by D'Arcy Lussier
    So tonight this convo happened: Intrigued, I viewed the video Lee mentions and found that its the now infamous Brent Ozar video which shows a bug in Word on the Surface RT (you can read this article which talks about the tempest in a teacup that ensued). But Lee is correct – in the video, when Brent starts up Word 2013, we see this: That sure does look like a desktop doesn’t it! But…aren’t Windows RT devices *not* supposed to come with a desktop? Actually, it does. However, it’s not a *full* desktop. From Seth Rosenblatt’s fantastic Windows RT FAQ article: Windows RT will have a Desktop mode, but it will be restricted to pre-installed, Microsoft-produced software. This will include touch-optimized versions of Microsoft Word, Excel, PowerPoint, and OneNote as the new Microsoft Office So yes, there’s a desktop mode in Windows RT but no, you won’t be able to install apps to it. Confused yet? Read the rest of the Seth’s FAQ – it does a great job clearing the haze of confusion that Microsoft Marketing Merlins have cast upon all of us. D

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  • ArchBeat Link-o-Rama for 2012-03-21

    - by Bob Rhubart
    Webcast: Simplify Oracle RAC Deployment with Oracle VM event.on24.com Tuesday March 20, 2012 - 9am PT / Noon ET Learn how you can: Deploy an Oracle (RAC) Database environment in minutes with Oracle VM templates Create, deploy or convert existing systems into highly available cluster environments Instantly respond to changing demand by relocating resources between servers Speakers: Ronen Kofman – Product Management Director, Oracle Markus Michalewicz – Senior Principal Product Manager, Oracle Webcast: Oracle Business Intelligence Mobile event.on24.com Event Date: Wednesday, March 28, 2012 Time: 10 a.m. PT / 1 p.m. ET Speakers: Pete Manhardt – Director Enterprise Information at Smiths Group, plc Shailesh Shedge – Director BI & Analytics Practice at Ascentt Manan Goel – Director BI Product Marketing at Oracle Seth's Blog: The extraordinary software development manager sethgodin.typepad.com "Being good at programming is insufficient qualification for becoming a world class software project manager/leader," says marketing guru Seth Godin. Mismatch: Developer skills and customer demands | Floyd Teter orclville.blogspot.com "Those of us in the developer community may need to reconsider the law of supply and demand," says Oracle ACE Director Floyd Teter, "and get on with the process of matching our skills to the demands of our customers." SOA gets mobilized; mobile gets SOA-ized: survey | Joe McKendrick www.zdnet.com "Maybe mobile is the killer app for SOA that actually will convince people to adopt the architectural style." Integrating with Oracle Fusion Applications: Discovering Integration Artifacts | Rajesh Raheja rraheja.wordpress.com Rajesh Raheja briefly discusses "the ease with which integrations are now possible using standards-based technologies with enterprise applications." Chargeback and showChargeback and showback...both a 'throw back' | Tom Laszewski blogs.oracle.com Tom Laszeski discusses strategies for tracking and applying the costs of "IT services, hardware or software to the business unit in which they are used." GlassFish 4.0 Virtualization Progress - VirtualBox | The Aquarium blogs.oracle.com Want to spawn GlassFish instances as VirtualBox virtual machines? The Aquarium shares resources that will help you get it done. Thought for the Day "Spring is the time of plans and projects." — Leo Tolstoy

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  • Improving VPN performance - stronger encryption = more performance?

    - by Seth
    I have a site-to-site VPN set up with two SonicWall's (a TZ170 and a Pro1260). It was suggested to me that turning off encryption (so the VPN is tunneling only) would improve performance. (I'm not concerned with security, because the VPN is running over a trusted line.) Using FTP and HTTP transfers, I measured my baseline performance at about 130±10 kB/s. The Ipsec (Phase 2) Encryption was set to 3DES, so I set it to "none". However, the effect was opposite -- the performance dropped to 60±30 kB/s, and the transfers stall for about 25 seconds before any data comes down the line. I tried AES-128 and the throughput went UP to 160±5 kB/s. The rated speed of my line is 193 kB/s (it's a T1). Contrary to what I would think, stronger Ipsec encryption seems to improve throughput. Can anyone explain what might be going on here? Why would no encryption cause poor and highly variable performance, and cause transfers to stall? Why does AES-128 improve performance?

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  • Whys is System process listening on Port 80?

    - by Seth Spearman
    I am running Windows 7 RC1. I have multiple issues getting IIS to work on my system and today when I installed a new application and I tried to load it using http:\localhost\MyApplication I get absolutely no errors and I get no page load. Just a pretty, white blank page. I did some digging and I found something about some other process listening on port 80 so I did a scan using netstat -aon | findstr 0.0:80 and discovered that PID 4 was listening on that port. PID 4 does not show in task manager so I fired up Process Explorer and it showed me that PID 4 is the System process. (Multiple google searches seems to indicate that System always uses PID 4). Since then I am basically stuck. I have no idea why System needs port 80 and what to do about it. If you google the following strings you will find two helpful Experts-Exchange articles at the top of the search results and you can read them for some helpful information. (If I gave the direct URL to the pages then Experts-Exchange would ask you to pay...but when you click on the results from a google search you can scroll all of the way to the bottom to read the exchanges.) Here are the google searches... "System Process is listening on port 80 (Vista)" "SYSTEM Process is listening on Port 80 and Preventing IIS Default Website from Running" The last entry from the first result showed how to do a trace of http.sys at the following URL: http://blogs.msdn.com/wndp/archive/2007/01/18/event-tracing-in-http-sys-part-1-capturing-a-trace.aspx Trace showed nothing useful. Any thoughts?

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  • Linux centos trouble with egrep command in words folder

    - by seth
    i need the commands to list these things for a class but for the life of me i cannot figure it out if anyone could offer any insight on how to get so specific with the egrep command or just answer the questions it would be highly appreciated some i have already figured out but if they look wrong any corrections may help too List all words that have the letter a followed immediately by the letter z. egrep {a,}{z,} words List all words that have the letter a followed sometime later by the letter z (there must be at least one letter in between). Egrep {a,?,z} words List all words that start with the letter a and end with the letter z. egrep "^a.*z$" words List all five letter words that start with the letter a and end with the letter z. List all words that start with two capital letters followed immediately by at least one lower case letter. List all words with two consecutive a’s or i’s or u’s. Use {2} to denote “two consecutive” and the pipe character, |, to denote “or”. egrep [a|i|o] {2} words List all words that contain a q where the q is not immediately followed by a u. For instance, queen should not be in your list but Iraqi should be. List all entries in the file that contain at least one non-letter.

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  • Adjust Mac OS X's colors

    - by Seth
    I downloaded an app several months ago for the Mac that enabled me to adjust the colors of the monitor to work with different light sources. There was a filter for daylight, incandescent, fluorescent, etc. After re-installing I can't seem to locate it again. Does anyone know this application? UPDATE Never mind, after all that Googling and asking here I found it. It's called Flux http://www.stereopsis.com/flux/ Highly recommended if you have any eye strain.

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  • What are some topics you'd like to see covered in an 'Introduction to Network Security' book?

    - by seth.vargo
    I'm trying to put together a list of topics in Network Security and prioritize them accordingly. A little background on the book - we are trying to gear the text towards college students, as an introduction to security, and toward IT professionals who have recently been tasked with securing a network. The idea is to create a book that covers the most vital and important parts of securing a network with no assumptions. So, if you were a novice student interested in network security OR an IT professional who needed a crash course on network security, what topics do you feel would be of the upmost importance in such a text?

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  • iTunes mono play?

    - by Seth Glickman
    I've got a set of speakers, but one of them doesn't work. Is there any way to get iTunes to output to mono, but with both channels? I'm on Leopard, and going to System Preferences - Sound - Output and sliding the Balance all the way to one side doesn't help, as it doesn't combine the channels.

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  • Migrating from Exchange 2003 to 2010 UID changes from 32 characters to 64 characters

    - by Seth
    We have built a custom CRM tool that integrates with Exchange 2010 using Exchange Web Services. The issue we are encountering revolves around editing appointments through the CRM tool that were created in exchange 2003. We have migrated the sales staff from Exchange 2003 to 2010 so that we could use EWS. EWS works great except for appointments that were created prior to the migration. Those appointments created prior to the migration in Exchange 2003 cannot be modified using EWS. The reason is that the ExchangeItemUID for the appointment changed from 32 characters to 64 characters. EWS does not recognize ExchangeItemUIDs that are 32 characters. We are looking for a solution that will allow us to modify these appointments. We are open to ideas of running a script that will update all appointment events for the sales people so that 2003 appointments are converted to 2010 format. We are also open to alternate IDs as opposed to using UID. I have seen some references to using CleanGlobalObjectID, but I don't see that property in EWS. Has anyone encountered this problem before? Any help you could give would be greatly appreciated!

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  • Use WMI to detect a USB drive was connected, regardless of whether it was mounted?

    - by Seth Petry-Johnson
    I am writing a script that uses MS KB 823732 to temporarily prevent users from plugging in new USB storage devices. This works fine, and the HKLM\...\Services\UsbStor registry key successfully blocks newly-connected devices from being accessed. Is there a WMI event that will tell me that a drive was connected, regardless of whether it was mounted? I tried querying for __InstanceCreationEvent but that is apparently raised only after the drive is mounted and made available, which doesn't fit my requirements.

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  • Nginx and PHP-FPM on OS X

    - by Seth
    I've been wanting to try out Nginx with PHP-FPM. I installed Nginx via Macports. I read that PHP 5.3.3 includes PHP-FPM, however, the PHP 5.3.3 configuration on Macports does not enable it. Can anyone explain or refer me to a tutorial on how to install PHP 5.3.3 with PHP-FPM for Nginx on OS X? I'd want to place it in /opt where Nginx is to keep it away from the PHP I'm using with Apache in /usr/local. I'm new to command-line stuff. Pardon my ignorance.

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  • Server 2003 PDC DNS not working..Failover server is...

    - by Seth
    In the midst of trying to utilize proc power, i create a fault tolerant DNS server a while ago. Since, Ive been trying to add another controller for exchange. So I thought I would revert back to a single primary DNS for the meantime and now Im balancing on a thread. The server i thought I uninstalled DNS, is still acting as DNS. And now the PDC does not resolve. Can anybody walk me through, Im overwhelmed and cant think straight... Im afraid if anyone restarts their machine they wont have internet. Update Ok so from the beginning. I was configuring Exchange on a new server 2008. How it happened I dont know, but it started to not resolve DNS. (exclamation mark on NIC) even though everything was static. So ultimately I decided to remove the server from the problem, because I noticed DNS was in disarray if I used the DNS IP of the first server. This is when I tested with nslookup on each DNS server. I had uninstalled DNS from the second server, but nslookup was still resolving with that IPaddress, which has me all wound up cause I dont understand. So, since the first DNS server isn't resolving, Im assuming if the second one isnt configured right I'll loose internet. Im just confused and dont know where to start troubleshooting...

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  • Do I need a VPN to secure communication over a T1 line?

    - by Seth
    I have a dedicated T1 line that runs between my office and my data center. Both ends have public IP addresses. On both ends, we have a T1 routers which connect to SonicWall firewalls. The SonicWalls do a site-to-site VPN and handle the network translation, so the computers on the office network (10.0.100.x) can access the servers in the rack (10.0.103.x). So the question: can I just add a static route to the SonicWalls so each network can access each other with out the VPN? Are there security problems (such as, someone else adding the appropriate static route and being able to access either the office or the datacenter)? Is there another / better way to do it? The reason I'm looking at this is because the T1 is already a pretty small pipe, and having the VPN overhead makes connectivity really slow.

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  • Is it better to use N WiFi or Cat5e ethernet for large file transfers?

    - by Seth
    I have a network containing 802.11 N WiFi Devices and gigabit ethernet devices, however using only Cat5e wiring. I know that if I used Cat6, the ethernet would be much faster however if I need to transfer a large file between a device thats connected normally connected via ethernet and a device thats normally connected via WiFi, would it be advantageous to bother plugging the WiFi device in to the network? or should I switch the ethernet device to WiFi? or does it really matter?

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  • Auto Launching PHP-FPM

    - by Seth
    My plist file <?xml version='1.0' encoding='UTF-8'?> <!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd" > <plist version='1.0'> <dict> <key>Label</key><string>org.macports.php-fpm</string> <key>ProgramArguments</key> <array> <string>/opt/local/bin/daemondo</string> <string>--label=php-fpm</string> <string>--start-cmd</string> <string>/opt/local/sbin/php-fpm</string> <string>;</string> <string>--pid=fileauto</string> <string>--pidfile</string> <string>/opt/local/var/run/php-fpm/php-fpm.pid</string> </array> <key>Debug</key><false/> <key>Disabled</key><true/> <key>OnDemand</key><false/> </dict> </plist> After rebooting, it's not loading up automatically. I still have to manually start php-fpm. I have tried unloading and adding RunAtLoad etc. with no luck and tried both these launchctl commands. sudo launchctl load -F /Library/LaunchDaemons/org.macports.php-fpm.plist sudo launchctl load -w /Library/LaunchDaemons/org.macports.php-fpm.plist

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  • Windows 7 laptop with problems shutting down

    - by Seth Sticco
    This is a thinkpad convertible tablet with Windows 7. When you try to shut down, it seizes at a screen with a gradient background and a Think/Thinkpad logo (forgot which). If you close it at that point, wait for the moon led to light up (meaning it's sleeping), then open it back up, it immediately continues and shuts down successfully. Any ideas on how to troubleshoot this?

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  • Seemingly random 404's for static files in Pyramid project

    - by seth
    I'm running a Pyramid project with mod_wsgi. Some of the files in my static directory (images, stylesheets, javascript) load fine, but others are coming up as not found. The files that are not working are all web fonts (otf, svg, woff and eot). I tried adding a text file into the static directory where the fonts are to see if I could access it, but it also came back with 404. The same text file also can't be accessed when put in the images folder. From what I'm looking at, it doesn't seem to be a permissions issue. Any ideas?

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  • Why is Server 2012 assigning "169.254.*.*" series when creating DHCP server?

    - by Seth
    I have a small office, with ATT Motorola modem (192.168.1.254) set as passthrough to Dlink DIR-815 (LAN 192.168.0.1) I am trying to setup DHCP server on Server 2012, and when I create new DHCP server, the title is created as 169.254.. instead of the domain name. (Domain clients can retrieve IP's as defined in the scope) Non-domain clients are not receiving IP's from the server but rather the Motorola... How do I assure DHCP setup is properly creating itself, and how do I make sure domain and non-domain clients get IP's from the server?

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  • Can you disable the Ctrl-S (XOFF) keystroke in Putty?

    - by Seth
    I do a lot of ssh-ing, and periodically I hit Ctrl+S, which naturally sends an XOFF, and causes all kinds of problems (not to mention it takes a while for me to figure out what happened, then another while to remember that I need to press Ctrl+Q to recover. I would much rather instruct Putty to never ever let me type XOFF. Any ideas?

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  • In VirtualBox, how can I access host localhost from guest (Visual Studio Dev Server from IE7 testing VM)?

    - by Seth
    Host OS is Win7 running MyApp in the Visual Studio Development Server, bound to localhost:51227, VM is VirtualBox configured with NAT. Guest OS is Win XP with IE7 installed. My goal is to debug MyApp (running on host) from within IE7 (running on guest). Visual Studio Development server only binds to the loopback network device (i.e. localhost). It does not bind to the external IP address of my host. I've tried access 10.0.2.2:51227 from IE7 on the guest (and confirmed that 10.0.2.2 is the gateway address using ipconfig), but it appears that 10.0.2.2 binds to the external IP of the Host, NOT the loopback IP (localhost), so this does not work. Any suggestions?

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