I have a Nancy project on .NET 4.8 in C# which was giving the error below on this line:
host = new NancyHost(new HttpBootstrapper(), hostConfigs, uri);
System.BadImageFormatException: Could not load file or assembly [name of assembly] The
module was expected to contain an assembly manifest
The assembly referenced is a 3rd-party 32-bit C DLL which one of my C# DLL's was referencing. All other projects using this DLL worked fine. Just the Nancy Project was not happy.
Now this has happened before and I had forgotten how to solve it. Thus, I'm writing and answering my own post on this. It's a hard error to solve because BadImageFormatException happens all over the place for many very different reasons.
Here is the solution that apparently I've been using for years, which only crops up when I reset my Exception settings in Visual Studio: simply Ignore those exceptions!
Just clear the checkbox "Break when this exception type is thrown". Everything will work perfectly. I have no idea what the underlying issue is, no idea if the problem is important or not. But this solution works perfectly find and lets me get to the 10,000 other issues that I need to solve on a daily basis.
I think it's related to old C DLLS being called by C#. It would be interesting to understand how to fix it, but that is not mission critical.
I looked for the answers here and there with no luck, so I decided to ask out.
I want to implement openalpr (open source Automatic License Plate Recognition)
repository on my own PC and I am following this video to accomplish the task. I have done all the steps he did and at the end, when I tried to build it but, in one of the .cs code there is CS0246 error that says:
Error CS0246 The type or namespace name 'AlprNet' could not be found (are you missing a using directive or an assembly reference?) number_plate c:\users\sohib\documents\visual studio 2015\Projects\number_plate\number_plate\Form1.cs
I could only find AlprNet in my D:\Projects\plate_recognition\openalpr-master\src\bindings\csharp\AlprNetTest and it is in .csproj format.
AlprNet is not in .dll format like other references so I cannot reference it in References.
I found some say that it might be because of different versions of .NET Framework platforms. I almost did nothing to check that, because I don't think it's related to .NET
In my mere opinion I should link that AlprNet.csproj to get its content, but I'm not sure. If someone can help get around this issue, I'd be very grateful.
If it's not a .net Assembly (dll) that's referenced and it's not a nuget package, then check that the code isn't expecting the Assembly to already be present in the Global Assembly Cache (If you have access to another developer machine where this works, this is easy to check).
Failing that, adding the .csproj to your .sln and then referencing it sounds like the way to go (provided you have access to that of course!).
This is probably a dumb question but I can't for the life of me figure it out. I'm trying to use the a Tesseract C# wrapper (https://github.com/charlesw/tesseract) and I've got it all working except for one error that reads
Error 11 The type 'System.Drawing.Bitmap' is defined in an assembly
that is not referenced. You must add a reference to assembly
'System.Drawing, Version=4.0.0.0, Culture=neutral,
PublicKeyToken=b03f5f7f11d50a3a'.
My first thought was "oh, let me just add an assembly reference to System.Drawing". Except there isn't one. When I right click References in the Solution Explorer -> Add Reference -> Assemblies -> Framework there is no System.Drawing. I did find System.Drawing.dll under COM, but it won't let me add it, saying
The ActiveX type Library [path] was exported from a .NET assembly and cannot be added as a reference. Add a reference to the .NET assembly instead.
Typing "using System.Drawing" at the top of my program does not cause an error, but it also does not solve the problem.
Any help is appreciated.
Edit: Am I in the right place?
You won't go far with this project, there's this dependency for System.Drawing and the whole project doesn't seem like it's targeted towards Xamarin.
As written here Xamarin Tesseract OCR binding for Android there are bindings for Xamarin.iOS, and the person is asking for bindings for Xamarin.Android. There's indeed a version of tesseract for Android here https://github.com/rmtheis/tess-two and apparently the response is to create a binding to this Java Android version.
Both projects, the binding for Xamarin.iOS as well as Xamarin.Android are bindings to platform specific bindings who both wrap the native C++ library. Probably the best solution would be to completely bypass the Java and Objective-C wrapper by create a specific P/Invoke wrapper for C#using SWIG.
I'm using Visual Studio 2013, and I'm getting an error in my C# code that I can't figure out. I'm working with the Microsoft Kinect SDK, but I'll keep it general.
I downloaded the SDK, and I can get the included sample programs to build and run. But when I try to use the code in my own project, I get the
Type or namespace name 'Kinect' does not exist in the namespace 'Microsoft' (Are you missing an assembly reference)
error.
The thing is, I'm not missing an assembly or reference. I have it added to the project's references, and the path is valid. Also, the using statements at the top of the file will autocomplete to "Kinect" for me. If I start typing using Microsoft., Kinect will appear as an autocomplete option.
What are the steps to debugging an error such as this? Could it be a 32/64 bit issue? I tried using Dependency Walker to look at the Kinect DLL, and while it throws some errors (Error: Modules with different CPU types were found.), it doesn't show any issues that I don't see with other DLLs that I'm using successfully.
What are some other potential issues that might cause a problem with DLLs not being recognized?
1 - Try going to your project settings and verify the version of the .NET framework it uses.
The best to do is to choose the same version as the external libraries.
If it's a client profile, it will very often bring that exact problem. (I'm not sure what the client profile is, but I ended up never using it...)
2 - Check if any of your references got an exclamation mark.
This question already has answers here:
Getting "type or namespace name could not be found" but everything seems ok?
(44 answers)
Closed 8 years ago.
I have a C# solution with several projects in Visual Studio 2010.
One is a test project (I'll call it "PrjTest"), the other is a Windows Forms Application project (I'll call it "PrjForm"). There is also a third project referenced by PrjForm, which it is able to reference and use successfully.
PrjForm references PrjTest, and PrjForm has a class with a using statement:
using PrjTest;
Reference has been correctly added
using statement is correctly in place
Spelling is correct
PrjTest builds successfully
PrjForm almost builds, but breaks on the using PrjTest; line with the error:
The type or namespace name 'PrjTest' could not be found (are you missing a using directive or an assembly reference?)
I've tried the following to resolve this:
Removed Resharper (since Resharper had no trouble recognizing the referenced project, I thought it might be worth a shot)
Removed and re-added the reference and using statement
Recreated PrjForm from scratch
PrjForm currently resides inside the PrjTest folder, I tried moving it to an outside folder
Loaded the solution on a different computer with a fresh copy of VS 2010
I have done my homework and spent far too long looking for an answer online, none of the solutions has helped yet.
What else could I try?
See this question.
Turns out this was a client profiling issue.
PrjForm was set to ".Net Framework 4 Client Profile"
I changed it to ".Net Framework 4", and now I have a successful build.
Thanks everyone!
I guess it figures that after all that time spent searching online, I find the solution minutes after posting, I guess the trick is knowing the right question to ask..
In my case I had:
Referenced DLL : .NET 4.5
Project : .NET 4.0
Because of the above mismatch, the 4.0 project couldn't see inside the namespace of the 4.5 .DLL. I recompiled the .DLL to target .NET 4.0 and I was fine.
PrjForm was set to ".Net Framework 4 Client Profile" I changed it to ".Net Framework 4", and now I have a successful build.
This worked for me too. Thanks a lot. I was trying an RDF example for dotNet where in I downloaded kit from dotnetrdf.
NET4 Client Profile:
Always target NET4 Client Profile for all your client desktop applications (including Windows Forms and WPF apps).
NET4 Full framework:
Target NET4 Full only if the features or assemblies that your app need are not included in the Client Profile. This includes:
If you are building Server apps, Such as:
ASP.Net apps
Server-side ASMX based web services
If you use legacy client scenarios, Such as:
o Use System.Data.OracleClient.dll which is deprecated in NET4 and not included in the Client Profile.
Use legacy Windows Workflow
Foundation 3.0 or 3.5 (WF3.0 , WF3.5)
If you targeting developer scenarios and need tool such as MSBuild or need access to design assemblies such as System.Design.dll
Another thing that can cause this error is having NuGet packages that have been built with a newer version of .NET.
The original error:
frmTestPlanSelector.cs(11,7): error CS0246: The type or namespace name 'DatabaseManager'
could not be found (are you missing a using directive or an assembly reference?)
Further up in the log I found this:
C:\Windows\Microsoft.NET\Framework\v4.0.30319\Microsoft.Common.targets(1605,5): warning MSB3275: The primary reference "[redacted]\DatabaseManager\bin\Release\DatabaseManager.dll" could not be resolved because it has an indirect dependency on the assembly "System.Data.SQLite, Version=1.0.94.0, Culture=neutral, PublicKeyToken=db937bc2d44ff139" which was built against the ".NETFramework,Version=v4.5" framework. This is a higher version than the currently targeted framework ".NETFramework,Version=v4.0".
The solution was to re-install the NuGet packages:
http://docs.nuget.org/docs/workflows/reinstalling-packages
I solved mine because the other project was coded with .NET 4.5 and the other one was coded 4.0
The using statement refers to a namespace, not a project.
Make sure that you have the appropriately named namespace in your referenced project:
namespace PrjTest
{
public class Foo
{
// etc...
}
}
Read more about namespaces on MSDN:
Using Namespaces
I encountered this issue it turned out to be.
Project B references Project A.
Project A compiled as A.dll (assembly name = A).
Project B compiled as A.dll (assembly name A).
Visual Studio 2010 wasn't catching this. Resharper was okay, but wouldn't compile. WinForms designer gave misleading error message saying likely resulting from incompatbile platform targets.
The solution, after a painful day, was to make sure assemblies don't have same name.
It is also possible, that the referenced projects targets .NET 4.0, while the Console App Project targets .NET 4.0 Client Library.
While it might not have been related to this particular case, I think someone else can find this information useful.
The compiled dll should have public Class.
I had the same issue. The target frameworks were fine for me. Still it was not working.
I installed VS2010 sp1, and did a "Rebuild" on the PrjTest. Then it started working for me.
Other problem that might be causing such behavior are build configurations.
I had two projects with configurations set to be built to specific folders.
Like Debug and Any CPU and in second it was Debug and x86.
What I did I went to Solution->Context menu->Properties->Configuration properties->Configuration and I set all my projects to use same configurations Debug and x86 and also checked Build tick mark.
Then projects started to build correctly and were able to see namespaces.
Changing the framework to
.NET Framework 4 Client Profile
did the job for me.
For COM/ActiveX references, VS 2012 will show this error right on using statement. Which is quite funny, since it's saying that may be you are missing a using statement.
To solve this: register the actual COM/ActiveX dll even if it's in the neighbor project, and add a reference through COM channel, not project channel. It will add Interop.ProjectName instead of ProjectName as a reference and this solves this strange bug.
If your project (PrjTest) does not expose any public types within the PrjTest namespace, it will cause that error.
Does the project (PrjTest) include any classes or types in the "PrjTest" namespace which are public?
just changed Application's target framework to ".Net Framework 4".
And error got Disappeared.
good luck;
:D
check your Project Properties, your Reference Paths should be empty like this:
Regards