There are a lot of posts on here about this, I'm using this code from another SO post and placing a delegate assignation in my Main() method. None of the other posts have directly answered my question.
I've got my third party assembly embedded as a resource but when I fire up the app:
I'm getting a TypeInitializationException with an inner of FileNotFoundException. It's trying to find the assembly on the file system and failing.
it's never getting to the Main method, where the event handler for AssemblyResolve is assigned
I have two assembly refs that are embedded in my Resources.resx, one is a third party tool (command line parser) and the other is a Library file where the meat of the application resides.
Maybe this isn't possible with a console app? Seems unlikely but I don't see a way around it.
Re: ILMerge etc: I'd like to get this done entirely in code without involving any tools. Reason: I don't want to have source code in the repository that requires other team members to install a tool that they probably don't have already. If that's not possible then ILMerge looks like the next best option.
Consider using ILMerge to merge the assemlies into one rather than embedding as a resource. This is download site for ILMerge.
You would merge your third party assemblies into your console app.
You could also look at application virtualization tools like XenoCode. They can package multiple assemblies (including the .net framework itself) into a stand alone executable.
If it is mixed mode assembly, it has to reside on the disk. Some limitation or something.
Related
I have a WPF application whose output is a.exe. This application is dependent on an external b.dll (whose source code I have access to).
Requirements:
The output should only be a.exe which should contain the dll. I don't want to provide my users with a separate dll (if it can be avoided)
I should be able to obfuscate the code. (I don't want anyone to be able to modify it).
Approaches tried:
I embedded b.dll inside a.exe, it worked. But I was not able to obfuscate the exe as it gave an error that it was unable to find b.dll.
I obfuscated a.exe and b.dll but it did not work. It was unable to find b.dll.
Alternate approach :
Is there any way that I can perhaps add the spruce code of b.dll to my project and have the dll be compiled to the exe itself rather than a separate dll.
Is it possible to make this alternate approach work or are there any other ways ?
If nothing works, I know that I can compile a and b separately, obfuscate a and provide b as a separate file (what I'm trying to avoid).
Apologies for the formatting issues, if any, I'm using the android app. Let me know if you need any details.
I have had great success with Eazfuscator.Net in the past.
http://www.gapotchenko.com/eazfuscator.net
To run it from the command line enter the following command:
Eazfuscator.Net.exe -n a.exe b.dll
It will combine the two files into a single exe. The main program will be able to access the dll.
You can even set up Visual Studio so that the command line above runs as a post compile event.
Assembly embedding may seem quite confusing, so here is how it's usually done:
The dependencies are obfuscated if needed.
The target assembly is obfuscated. At this point, the obfuscator is also instructed to embed certain dependencies as a part of obfuscation process.
As a result, the embedded assemblies are stored as a resource of the target assembly.
In order to load dependencies at runtime, obfuscators usually install a handler for AppDomain.AssemblyResolve event that is raised by CLR when it fails to resolve an assembly automatically.
The handler extracts and loads an embedded assembly from the resource.
That's it. A good obfuscation tool allows achieving that quite easily. I don't see why it wouldn't work in the case with WPF application. If there are problems, I would recommend contacting product support.
Another option is assembly merging. Unlike embedded, the merged assemblies become an inseparable part of the target assembly code. For this reason, the assembly merging often helps to achieve a better obfuscation coverage and application startup time comparing to embedding. Although it may look a better option, merging may sometimes break the application functionality.
I have a Visual Studio 2010 C# project which creates an .exe and this project is using some 3rd party class library.
My project is located in: /MyFramWork/tests/test1
3rd party library is located at: /MyFrameWork/bin/utils/
I am adding the reference to the library by using References->Add Reference->Browse. I can see that in the project file all is fine:
....\bin\utils\log4net.dll
False
I would like to reference the 3rd party library without using the option "Copy Local". However if I don't use the option, the library is not found and I get an exception.
My question is: Is there a way to specify that the 3rd party library should be found at ....\bin\utils. It seems that when the .exe gets build the information from the .csproj gets lost.
By default, .NET apps look for their dependencies in only two places: the EXE directory, and the GAC (Global Assembly Cache).
You have three choices:
You can make sure the dependency gets copied into the same directory as your EXE (this is what Copy Local does). This is the best choice most of the time, which is why it's the default when you reference an assembly that's not already in the GAC.
You can install your dependency into the GAC using gacutil. This might be a good choice if your dependency isn't going to change, is going to be in a different location on every development machine (i.e. if relative paths won't work well), and if you want to use it from many different projects. But it's a major pain if the dependency is still under active development and changing frequently. You'll also need to make sure to put the DLL into the GAC on every computer you deploy your app to.
You can customize the dependency-loading behavior so it looks in other places, as Hans noted in his comment. This is an advanced option and comes with a whole new set of headaches.
Normally, you would just use Copy Local; it's a very sensible default. You should need a fairly compelling reason to do anything different.
Use the <probing> element to specify where the CLR should search for your assemblies. The only restriction is that the assemblies must be located in subdirectories of your application's base directory.
For example, if your application base directory is C:\MyFramework, then you could have your assemblies in C:\MyFramework\bin.
Have a look at this article to learn how the CLR searches for assemblies.
If you need to load assemblies from custom locations, you could try the Assembly.LoadFile Method.
The following links may be useful:
C# - Correct Way to Load Assembly, Find Class and Call Run() Method
http://www.csharp-examples.net/reflection-examples/
It's me Potzon. I am still investigating this incredibly silly problem.
I have been hoping for some elegant solution. I am about to build fairly large framework with lots of assemblies which would be placed inside /Framework/bin/. However I wanted to have some directory structure inside the the directory, for example /bin/utils, /bin/test, /bin/devices/ and so on.
One possible solution that I have found is to define environmental variable DEVPATH (see here http://msdn.microsoft.com/en-us/library/cskzh7h6.aspx) but it turns out that .net4 is not using this variable when an assembly is run independently (outside the visual studio), or at least this is the case for me - I can't make it work.
It seems that the solution to put all the assemblies inside the /bin directory without using sub-directories is the best. I think I will give up and just do it this way.
Is there a way to keep any DLLs needed for my Visual C# program (such as SQLite) inside the actual EXE so it doesn't require the files to be present?
If not, can anyone show me how to make a wrapper for my program (independent of .NET, so maybe C++?) to copy/load required files to the working directory before starting the program itself.
What I intend to end up with is a single EXE file that can be deployed anywhere and set itself up like a transformer. All it requires is the following criteria:
SQLite is present
OpenHardwareMonitorLib is present
.NET 2.0 is installed (if not, offer install with redistributable package)
Microsoft provide a tool for merging DLLs. It's called ILMerge.
It doesn't always work, I believe certain things can cause problems. But it's definitely the easier option!
If the problem is redistribute only one file, you can create a "installer" exe, that unpack all your dependencies (from executable content).
If you don't want to leave all dlls in your production environment, you can merge all IL code in the main executable. you can use ILMerge (but it's not the only product that can do this)
You can merge the dependencies into the main executable. After your build completes you run an additional tool that combines the IL code into a single assembly.
ILMerge can do this but is a bit cumbersome to use.
Some (proprietary) tools can do this as well. I know of at least one obfuscator (DeepSea) that can do this. DeepSea also allows you to specify what you want to include and what types you want to expose from the resulting assembly.
Full disclosure: I know the guys that build DeepSea Obfuscator.
I guess you could embed the target assemblies as resources and then unpack them in some custom assembly resolution code?
Edit: there's an example of this here: Embedding assemblies inside another assembly
Is there a way to compile C# files into one single file that is ready to give to the user?
One way is to use ILMerge. This will merge multiple assemblies into a single one (think combining all DLLs and a main exe into a single exe).
Yes :) But you must put all your sources into a single assembly and compile it to an EXE. Also note that the target system must also have the required .NET infrastructure installed.
Note that security policies on the target system may prevent the user from directly running your app.
Lastly, unless you "NGEN" your code, it will be jitted the first time it runs. This will incur some startup time costs. THese can be considerable in some instances.
If your looking to also merge the .Net assemblies required by your app, you can use something like This to even compile in System.dll, System.Windows.Forms.dll, etc, so the end user wont even need .Net installed.
I got this from a similar question (sorry to whoever posted the answer - I can't seem to find the original to link it here):
how to embed your application’s dependent DLLs inside your EXE file
It is an excerpt from Jeffrey Richter's CLR Via C#. I have not tried it yet but looks very promising. I think it will work with WPF as well (about to find out for myself).
I'm working on a module for a CMS. This module is distributed as a class library DLL.
I have several utility libraries I'd like to use in this module. Is there anyway I can link these libraries statically so I won't have to distribute several DLL's (thereby distributing my utility libraries separately)?
I would like to have only one DLL.
You can merge your many DLLs with ILMERGE:
http://research.microsoft.com/~mbarnett/ILMerge.aspx
Haven't tried it myself. Hope it helps.
Download here:
http://www.microsoft.com/downloads/details.aspx?familyid=22914587-B4AD-4EAE-87CF-B14AE6A939B0&displaylang=en
Brief Description (from download-page)
ILMerge is a utility for merging multiple .NET assemblies into a single .NET assembly. It works on executables and DLLs alike and comes with several options for controlling the processing and format of the output. See the accompanying documentation for details.
If you don't want to use ILMerge, see this page:
http://blogs.msdn.com/b/microsoft_press/archive/2010/02/03/jeffrey-richter-excerpt-2-from-clr-via-c-third-edition.aspx
editor's note: Jeffrey Richter advices to put your dlls into exe file as resources (For each DLL file you add, display its properties and change its “Build Action” to “Embedded Resource.”). Then a custom class loader is needed to make the executable work (At runtime, the CLR won’t be able to find the dependent DLL assemblies, which is a problem. To fix this, when your application initializes, register a callback method with the AppDomain’s ResolveAssembly event).
Be sure to change the resourceName string to point to your actual resources. (e.g. change AssemblyLoadingAndReflection to your project name.)
The short answer for this is no!
You can not link in a dll during compilation.
I don't know if there is some subtle way to do this, but you would probably have to distribute the dlls along with your cms.
The best way to do this is to make some kind of re-distributable.