I'm working on a project that targeting .NET 4.0 Framework. I added a reference to a third party dll file and call its methods in my code and have no error. But when I build the project it gave me The type or namespace error with blue underline on the methods of the dll. Using .NET Reflector I checked dll .NET Version of mscorlib.dll it is 4.0.0.0. My application Target .NET Version is 4.0 then Why I'm getting this error.
What I have done.
Remove all references to the library. Clean the project. Restart the project. again add the references. Not good in English please guide me. Stuck in it last 4 days.
Check if you have privileges to access the dll file. Then try running Visual Studio as administrator. If it does not help try to build the solution as 64x/86x not Any CPU.
Related
I have a problem, I've installed Visual Studio C++ 2010 Express and whenever I make a new project then run the debug to test it it gives me the following error:
Error 2 error C1107: could not find assembly 'mscorlib.dll': please specify the assembly search path using /AI or by setting the LIBPATH environment variable c:\Users\Cretu\documents\visual studio 2010\Projects\test2\test2\stdafx.cpp 1
Leaving this aside, when I close Visual C++ and open it and then try to open my project it gives me this error:
The Visual C++ project "test2" is targeting ".NETFramework, Version=v4.0", which is not installed on this machine. You must download this framework in order to open...
But I already have installed the following .NETFrameworks on my machine (Control Panel -> Installed Programs, that's where i got their name):
Microsoft .NET Framework 1.1,
Microsoft .NET Framework 4 Client Profile,
Microsoft .NET Framework 4 Extended.
Can somebody please explain why this is happening? I've already re-installed .NET Framework 4.0 and rebooted my PC but I still get this error. Please help. Thanks in advance for taking the time to read my question.
You are missing quite a few packages. Im guessing you tried to install .NET manually - well that never works, you need to use an official installer, heres my list of working .NET 4 and 4.5, im guessing the "Chart Controls" are actually unnecessary :
I am upgrading a solution to Visual Studio 2012 (and 2013, but that's a side issue)
I am encountering the following error (many times) when compiling the test projects:
Error 345 The type 'System.Action'
exists in both 'c:\Users\neil\Documents\Visual Studio 2013\Referenced
Assemblies\Third Party Dlls\Moq\Moq.dll' and 'c:\Program Files
(x86)\Reference
Assemblies\Microsoft\Framework.NETFramework\v4.0\System.Core.dll' .....
We are using Moq 4.0000, and the solution is using .Net 3.5 in all projects. It looks like the .Net framework now has a System.Func<....> implementation (previously only defined in Moq?) Oddly we haven't had this problem with VS2008, also using .Net 3.5.
Does anyone know how to resolve this?
Action and Func with many parameters were added only with .NET 4.0. Was it initially a .NET 2.0 project? In that case, you can try to remove the System.Core.dll from the references and try to see if the project compiles. Despite the name, it is unessential and was added only with .NET 3.5. The cleanest solution would be to upadate your library, Moq, with an updated one that fixes the clash in .NET 4.0. If that is not an option, follow Pratick advice to use assembly extern aliases.
I'm currently trying to convert a WiX 3.5 custom actions project in Visual Studio 2008 to WiX 3.7 and Visual Studio 2012 and I'm getting the following exception:
The type or namespace name 'MyNamespace' could not be found (are you
missing a using directive or an assembly reference?)
The dll is definitely referenced and Visual Studio 2012 has no problem seeing the namespace. Everything under the namespace even pops up in Intellisense, but when I build it I'm getting this exception.
Anyone have an idea of what's going on here?
Additional Info:
The namespace I'm referencing is a .Net 2.0 library and the custom actions project is a .Net 2.0 project.
EDIT:
After further investigation, I'm getting this warning, which I'm guessing is the root of the problem:
The primary reference "MyNamespace, Version=8.5.1.20, Culture=neutral,
PublicKeyToken=f593502af6ee46ae, processorArchitecture=MSIL" could not
be resolved because it has an indirect dependency on the .NET
Framework assembly "mscorlib, Version=4.0.0.0, Culture=neutral,
PublicKeyToken=b77a5c561934e089" which has a higher version "4.0.0.0"
than the version "2.0.0.0" in the current target framework.
Why is it trying to use mscorelib 4.0 when this is a 2.0 project?
So it turned out that the dll being reference, while compiled to target the .Net 2.0 framework, was being compiled with the 4.0 compiler. Switching the project to compile with the 3.5 compiler solved the problem.
This may be completely unrelated but I had a similar issue yesterday. I had accidentally copied a class file (.cs) from one solution into another solution. Clearly, I hadn't added the references to the other solutions.
In our case, while the referenced dll was targeting .Net 4.0, it had its own reference to a .Net 4.5.2 dll. The referenced 4.0 framework target led us to believe that 4.5 or 4.5.1 were sufficient to handle things, but they weren't—the referencing project had to be 4.5.2 to handle the dll and all its references.
This was clearly an error on the part of the dll maker.
I am working on a C++/CLI project with VS 2012 in Dynamic Library (.dll) and x64 mode.
If I switch the mode to Static Library, I get the error below.
Error 1 error C1107: could not find assembly 'mscorlib.dll': please specify the assembly search path using /AI or by setting the LIBPATH environment variable C:\Depot\Main\Current\Sln\ALibraryProject\Stdafx.cpp 1 1 ALibraryProject
I tried removing the reference to the mscorlib.dll then adding it again from:
Project > Properties > General > Common Properties
But that didn't help. As I know that VS handles the reference to the .NET assemblies, I don't want to add a disk file reference to it as it seems illogical! Did anybody face this before?
I had the same problem when converting my solution from the VS2010 compiler to VS2013 compiler.
I resolved it by changing the project settings (for the project containing the managed .cpp file that was throwing this error) as follows: In Project Settings | C/C++ | General | Additional #using Directories I added the macro $(FrameworkPathOverride). This resolves to the reference assembly directory for the version of .NET that you're targeting, which in my case is C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework.NETFramework\v4.5.1
If I switch the mode to Static Library
This is not the typical error you get when you try to build a static library with /clr in effect. I'd have to assume you've been tinkering with project settings to get rid of the inscrutable linker errors you get when you try to do this.
Core issue is that the C++/CLI build system doesn't support static libraries that contain MSIL. Managed code doesn't use a linker, binding happens at runtime. Which makes the essential difference between static libraries and DLLs disappear. So Microsoft decided to not support it because it didn't make much sense to implement it. Unfortunately they don't yell loud enough when you try to do it anyway, the linker errors you get don't give enough of a hint what you did wrong. Workarounds, like merging with ILMerge don't work either, it cannot deal with mixed-mode assemblies. Merging the native code sections and their associated relocation table entries is very untrivial.
Keep in mind that it is fine to link native static libraries. A typical C++/CLI project has only the ref class wrappers that need to be built with /clr in effect. You can glue any amount of native code from libraries into the final assembly.
I'm forced to theorize about the actual compile error, too many programmers get this error for another reason that doesn't have anything to do with building static libraries and they are harassing me in the comments.
Do beware that targeting a different version of .NET than the one you have installed on your machine is quite a hazardous affair, particularly so if you want to target 4.0 and you have 4.5.x installed. The key element in your .vcxproj file is the <TargetFrameworkVersion>. This will be missing if you started the project targeting an old .NET version, you have to insert it yourself. The IDE also doesn't support changing it if it is present, again edit by hand.
Which is enough to coax MSBuild into generating the proper compile command. You can verify if that panned-out well, look in the *.tlog subdirectory of the Debug build directory for your project. The cl.command.1.tlog file shows the options that were passed to the compiler. It should contain:
/AI"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework.NETFramework\v4.0"
/FU"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework.NETFramework\v4.0\mscorlib.dll"
Note the subdirectory, very important that it matches your intended .NET target. v4.0 in this example. And very, very important that it does not point to c:\windows\microsoft.net, the legacy location for reference assemblies.
I have the same problem. Having a dll doesn't work, as I need to provide a native C++ wrapper for a .net object so it can fulfil a natice c++ interface - I can't use .net in a dll interface - this gives a compile error
This worked as a static library in VS 2010 (with .net 4)
Some of my executables and dlls which also have some code with /clr. They don't have an issue. I'm not trying to make a net Lbirary.
I solved it by removing dependency in old and not updated mixed lib, which was also configured only in Debug configuration, and as result, it started to get the same error as yours after I changed some code.
It was not simple to find it, because error is not clear, and the dependency was set up via "Additional Dependencies" in project settings.
Open visual studio and unload your project then Go to the project folder and open file .vcxproj . Search for tag "targetFrameworkVersion"
(if not present it means ur project is not using dot net frameworks.so no requirement of change)
Change it to required version
Save the file.
And now reload the project .
I have a project using Reactive Extensions and ReactiveUI. I upgraded to the pre release version and I have the following line of code
OAPHCreationHelperMixin.ObservableToProperty(observable,
Function(x) x.Value
Visual studio tells me there is an error here on the method ObservableToPropertyin that the following assembly is missing
Error 9
C:\Users\phelan\workspace\WeinMeasEval\WeinMeasEval\Global\ObservableBinding.vb
Reference required to assembly
'System.Reactive.Interfaces,
Version=2.0.20823.0,
Culture=neutral,
PublicKeyToken=31bf3856ad364e35'
containing the type 'System.Reactive.Concurrency.IScheduler'. Add one to your project.
Now I click the link which suggests it will add the reference and then nothing
happens. If I look in my project references I see that the assembly is indeed
in the assembly list and it is the correct version 2.0.20823.0 and if I look on
the path the DLL is indeed there.
Any ideas?
This is now fixed, check out ReactiveUI 4.0 Preview 5
It turns out that at this date reactive UI is not built yet for .NET 4.5 as the developer is having some build issues.
As a work around I build it myself by pulling the repository from Git and referring to the core library directly from within my .NET 4.5 project.
This seems to work at the moment. YMMV
Do you have Target Framework set to full .net or to Client Profile (in project settings)?