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What's the best way to call c# code in c code on linux

I am doing a project and have a C# library but I need to call it in C code on Linux. What's the most efficient way to do this? Performance is the first consideration.
Of course, I can make a C# service and use TCP to talk. But I wonder if it's the best way...
Thank you!

You can also use CoreRT to create native libraries from C# code and call them from C. You can find an example here
Edit: CoreRT has moved to runtimelab feature NativeAOT. Updated link.

I think the most standard solution is to have your C# service export a "web services" remote API, which the C code can then access via the standard Linux web services packages. In effect these support a form of RPC, but with web pages encoding the request and also the reply. The advantage of using web services is generality; your solution will port to any platform and will work from any language, not just C.
Another way to go is to use one of the new open-source packages from Google, Facebook, Twitter, etc. A bunch of the cloud vendors are open-sourcing their RPC infrastructures because many customers pose your exact question and need these solutions. Those will definitely be faster and more powerful in other ways too: they include powerful performance visualization tools and debuggers of various kinds. Microsoft has a remote method invocation technology too. So these are an option, perhaps less general but definitely faster. So you then have to ask how important speed is, for this particular path...
The bottom line then is that there are maybe five packages you could use. No idea which is winning or best!

how to manage Project in c# , ASP.NET MVC when i have a new copies and have something feature in it?

i have a project where i do something i have same copy from another who have do something in it later i have a thing to do currently.
so that's three copy and i am unsure that i am not confused with it. sometime i call wrong copy for finding the thing i want from them.
without using any software outside our office window any trick to manage all project or how i can manage them and make them one copy.
the same problem with some other problem come with when the same script used in two software , website who are used same script with have a small difference in both.
so i want to know how exactly all other manage them. i want to have a answer with .net plateform.

There are several source control solutions that have plugins to integrate directly with Visual Studio. I would recommend looking into Subversion. Currently at my office we use Vault, but it has some short comings, especially when it comes to renaming or moving a file and then editing it prior to a check in.
http://ankhsvn.open.collab.net/
http://www.sourcegear.com/vault/

I recently started a small pet project. It's written in C# with ASP.NET MVC3. As it's grown, my needs for source control also has grown. Here's what I've done:
Day one, I placed my project in a Dropbox folder. That way, I could reach my project files from all my computers (and even my iPhone).
A few weeks later, when I first had to make some serious changes and neede a fallback, I created a Mercurial repository in my Dropbox folder and commited all my code. I've got a blogpost on that here: http://csharptutorial.blogspot.com/2011/06/using-dropbox-with-mercurial.html. Mercurial is a great versioning system, because it doesn't require a server installation and your repository is copied in full to all locations where it's checked out.
Now, I'm looking at moving my project over to BitBucket (http://bitbucket.org/) where you also share and discuss code with others.
A good alternative to Mercurial is Git, using github.com in stead of bitbucket.org. Both have a learning curve, but they both represent modern version control tools and is well worth having a look at.

Source control and discipline.
You need to get an approach and method for managing your source. A source control system is essential for this. I use SVN and Ankh, as does Clayton.
However, you need an approach for using this. I always have branches. You can have development branches and merge these changes into a release branch when your code has passed all the tests. This way takes a discipline and time, but you need to do this to build quality into your system.

How do small programming teams work in C# .NET? [closed]

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What tools/plugins do you use for checking in/out code?
how to communicate changes made to the code, how to make request for new functionality?
How has your team solved this?

See this previously asked question:
Multiple Programmers in Software Development. How do we work on the same code and ensure it is always updated?
There are a lot of good answers to this question, and they apply to small and large teams.
For source control, we use Svn with the Tortoise SVN client. We've used other source control systems in the past, and have found this one to be the best for our needs.

I would recommend you use SVN for source code management, if you are using visual studio you can get numerous plugins for IDE integration.
http://subversion.tigris.org/
http://www.visualsvn.com/ = SVN Server & VS Integration
Try to set up Continuous Integration for this you can use Cruise Control .Net or Hudson. Cruise control can be set up to do a build on each check in and the history is shown on a web page.
http://confluence.public.thoughtworks.org/display/CCNET/Welcome+to+CruiseControl.NET
http://hudson-ci.org/
For requesting new functionality you could use a ticketsing system, wiki or Google Wave any one of these should enable you to keep track of requirements.
Hope this helps.

You can pretty much use any tools for small development teams you wish. There are lots of options.
Personally, my team uses SVN for code, and Trac for tracking - mostly because it's very cost effective for a small team. However, there's nothing C#/.NET specific about that setup.
If your team has MSDN subscriptions, you might want to consider Team Foundation Server. It has many features for integration with Visual Studio that are (arguably) superior to some of the alternatives.

You should use one of the many available source control repositories. Trust me, you won't know what you did without it :)

There are plugins for Visual Studio for working on a team, but personally I've never used them.
I've done team projects with both Subversion and Mercurial... just make sure to check in the solution and project files, and all related code.
Everyone will also need to be running the same version of Visual Studio.
For requesting new functionality, you might want to consider an external solution like Trac or Bitbucket or some other free system that includes issue tracking.

Well, how small? I work on a team of 5, and we communicate well with IM, or just dropping by and talking. That being said, the team is pretty responsible, so you can trust everyone to carry their weight. I would suggest you use subversion for source control if your company doesn't have anything.

We're a team of 3 C# developers.
For version control, we use AnkhSVN, an open source SVN client that integrates with Visual Studio.
For project management, issue tracking and feature requests, we use Redmine.

What tools/plugins do you use for checking in/out code?
Mercurial -- once you've used a DVCS, it's hard to imagine going back. Everybody uses their own favorite editor; usually, that's Emacs, which comes with support for many VCSs, including Mercurial.
how to communicate changes made to the code, how to make request for new functionality?
Changes are tracked in version control. You can look at the changesets as you pull them, or browse the web interface. Or just ask people at lunch what you're working on -- no developer is an island. New functionality is tracked, along with bugs, in the bug tracker.
How has your team solved this?
We're a small team using C#, but nothing here is specific to C# or small teams. I've used very similar systems with other size teams, and other languages/platforms.

We have a team of three and currently use Source Gear Vault for source control and Fogbugz for bug/feature tracking. Source Gear integrates into Visual Studio nicely and works over http which makes it easy to access from anywhere. Check ins and outs can be done directly in Visual Studio or a standalone client.
Source Gear also integrates with Fogbugz.
Used to use Visual Source safe and would never go back...

I work on a small team of 1-5, depending on the project.
What tools/plugins do you use for checking in/out code?
We use Git with Github for new projects, and TFS for some legacy work.
I see a lot of people recommending a certain provider without telling you why. I have used TFS, SourceGear, SVN (a little), and Git. I prefer Git because it stays out of my way. Git is command-line based. My typical source control workflow is a handful of simple commands, but learning those commands took a few tries.
how to communicate changes made to the code, how to make request for new functionality?
We use Pivotal Tracker for story writing and organizing priority.

Source code hosting for ASP.NET and WCF projects

I'm working on a project with 2 other developers and I need to host it online. I need a site to host it for me with features such as version control, and others neat features.
can you suggest any ?
the project is not an open source one.
thanks.

I use projectlocker.com
They have a free version.
One of the nice features is the monthly report that shows you what everyone on your team did.

I believe XP-Dev, would work well for you, they offer a free plan that has two private projcets. Pricing is here.

BitBucket, with Mercurial-based source control, has private repositories:
http://bitbucket.org/plans/

I'm using unfuddle and highly recommend it. It's free for 200MB/2 users. Subversion and Git are supported and the interface is nice and clean.

A lot of webhosts include these features as part of the normal monthly hosting plans. For example I use dreamhost.com and get subversion and trac included.

Coding Standard Wiki

At my place of work I've been put in charge of creating a coding standards document. Generally we follow what FxCop and StyleCop tools report to some degree but what we really require is document that will explain when to use a convention, why and maybe even a simple example.
This could be extended in the future for other purposes as well.
The first thing that came to my mind is to have an internal wiki site that we could build up and change easily over time but I've never used a wiki-based engine before and would like some recommendations.
If possible the engine should be in C# so we're able to tweak it to our needs if required.
If you think a wiki solution is the wrong way to go about this then please give an alternative :)
Update
I've just been informed, although we do have a php server it wont be staying, so I'm afraid php-based wiki ideas are off the table.
Update 2
Could you also (if possible) let me know if any of these solutions work with Active Directory?
Cheers
Tony

ScrewTurn Wiki is an free and open-source wiki made in C# and ASP.Net. Different database back-ends can be used, like MSSQL and MySQL, but also works without any database. It has several plugins to work with Active Directory.

Mindtouch Deki
Great wiki and it's built on C# and PHP, so you can use it on Mono or .NET
It also has Active Directory integration.
Download their ready-to-use VMware image. It started using it on my own PC then moved it to the company's VMware server when they had it ready.

We keep an internal wiki at my shop that has almost all of our documentation (not just coding standards). We didn't really see the need to roll our own so we just used MediaWiki...

We use JAMWiki and love it.
It is a solid application, we have had nothing but good interaction with both the application and the developers.
The guy you maintains the code does a great job answering questions and helping users out.

Brad Abrams has published an online set of C# coding standrds:
http://blogs.msdn.com/brada/articles/361363.aspx
If you go to the starter kits section of the Microsoft ASP.NET site, you will find several wikis to download such as ScrewTurn and Flexwiki. A wiki would be ideal for your needs by the sound of it :-)

I second MediaWiki. It's not C#, but it can be a nice excuse to sneak some free software in through the backdoor.
If you guys are a Microsoft shop, though, and are using Sharepoint, it has some built-in wiki-esque functionality.

In one project that I develop, I set up one MediaWiki wiki for development documentation, and one for online help.
I even generate part of the development documentation right from source code and database.

At the shop I'm at they use a commercial package which is really good: Confluence. What's especially nice is that it integrates with LDAP/AD so that you don't need a seperate login and it's build especially with business use in mind and has lots of free plugins. We couldn't live without it.

I am confused by what you mean when you say you don't have a php server. It runs on every platform known to man. I am noticing most Visual Studio Developers don't know that PHP runs on IIS.
I would go with mediawiki It has the biggest feature set and most add-ons developed for it in case you ever need to port your data elsewhere. If you need to modify your wiki you are doing it wrong.