I have downloaded published (code behind files are no there, combined with dll in bin folder) web application from Window Server 2008 where it is hosted, and open it with Visual Studio when I debug that application it shows following error:
"Could not load assembly because this assembly is built by a runtime newer than the currently loaded runtime"
I don't know how can I solve this problem and test application locally.
Please help me.
This errors happens when the DotNet framework you are using is of older version than the one used to build the assembly. You need to check which version of framework is used to build those assemblies and then use the same or higher to debug too.
I was getting this same error when running an installer for a Windows service, even when running the installer on the PC the installer was built on.
It turned out that although the Windows service project had been updated to .NET 4.5, the Setup project that was making the installer was still set to use .NET 2.0.
To check if the Setup project is using an older version of .NET than the project to be installed, in the Visual Studio Solution Explorer:
Expand the Setup project;
Under the Setup project, expand Detected Dependencies;
Under Detected Dependencies select Microsoft .NET Framework and check the Version property. Select the appropriate .NET version from the dropdown list;
Re-build the Setup project to create a new version of the installer.
This error can have a lot of other reasons, too. I had the same problem, and nothing helped until I stumbled across this:
TlbExp.exe error:This assembly is built by a runtime newer
I just ran into this issue when the assembly was built with a target framework of .NET 4, and v4.0.30319 was installed on the server, and other 4.0 apps were running successfully.
The problem arose because the app had originally been built targeting 2.0, and new 4.0 assemblies were pushed, but not the app.config file, which we generally update separately.
This means the supportedRuntime attribute was not updated in the config and caused the error. Adding the following to the app.config fixed our issue:
<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup>
One the the assemblies reference in the project might be built using a newer version of .net, check version of every assembly reference and correct accordingly.
Also check the application pool that this web site is running as. It could be framework 2.0 default on some older windows servers. Change it to framework 4.0.
Related
So let's say I have my app pool set for "4.0.30319". In Visual Studio, my project settings are set for ".NET Framework 4.6.2".
In my web.config, there is a line:
<httpRuntime targetFramework="4.5" maxRequestLength="30720" executionTimeout="36000"/>
And 4.8 is actually installed on the server running ISS.
Now lets say there was a change in behavior shipped in, say, 4.7. Will I see the new behavior in my application?
According to the docs:
If the version of the .NET Framework that the application was built against is present on the computer, the application runs on that version.
If the version of the .NET Framework that the application was built against is not present and a configuration file does not specify a version in a Element, the application runs on the latest version of the .NET Framework that is present on the computer.
If the version of the .NET Framework that the application was built against is not present and the configuration file specifies a version in a Element, the application runs on the latest version that is specified in the application configuration file and is present on the computer.
So I would say 4.8, You can always check it programmatically using:
Environment.Version
Additionaly check out this question.
After researching a lot and finding nothing about it, I decided to ask for collaboration here in the community.
I am trying to perform run in Visual Studio 2019 from a Razor Pages project, created in the 2017 version of Visual Studio. The Target Framework is net461.
However, the following error occurs:
NotSupportedException: Attempting to load an assembly from a network
location that would cause the assembly to be in safe mode in earlier
versions of the .NET Framework. This version of the .NET Framework
does not enable CAS policy by default, so this loading can be
dangerous. If it does not intend to confine the assembly, enable the
loadFromRemoteSources option.
I am not loading any assemblies over the network. All files are on my computer. Also, all exe, dll files are unlocked.
Error is in the startup.cs:
services.AddMvc()
I greatly appreciate any help.
are you creating .NET 4.6.* project or .Net Core? For .Net Core the target framework should be .NET Core 2.* or 3.* and make sure SDK is installed on your machine.
I have recently upgraded my project from asp.net core 1.1 to asp.net core 2.0. and app us using .Net framework 4.6.1. Application is working as expected on local dev machine but once it deployed to server with dotnet publish command I am seeing this error
InvalidOperationException: Cannot find reference assembly
'.NETFramework/v4.6.1/Microsoft.CSharp.dll' file for package
Microsoft.CSharp.Reference
I have also noticed that ref folder that use be present when using asp.net core 1.1 when published is now missing. How to fix this issue.
Same issue was resolved when MvcRazorCompileOnPublish was added to .csproj file.
Give it a try.
<MvcRazorCompileOnPublish>true</MvcRazorCompileOnPublish>
<MvcRazorExcludeRefAssembliesFromPublish>false</MvcRazorExcludeRefAssembliesFromPublish>
I noticed if you have the Views folder included with the compiled View.dll when you start your IIS pool, you get this error. I was doing this on purpose for a short term work around hack.
In my case (I run .Net core in console application mode) none of above solutions didn't works, i just downloaded .Net Framework 4.6.1 from this link.
I have a Web API that has version 5.1.2 of the Microsoft.AspNet.WebApi.Client package installed.
I am trying to access the API from an ASP.NET MVC application, which also has the same version of the package installed.
However, in the Global.asax of the Web API project, on the line below, I get the following exception:
WebApiConfig.Register(GlobalConfiguration.Configuration);
Attempt by method 'System.Web.Http.HttpConfiguration..ctor(System.Web.Http.HttpRouteCollection)' to access method 'System.Web.Http.HttpConfiguration.DefaultFormatters()' failed.
I found that this error occurs when you have multiple projects pointing to different .net versions.
For example if you have a Web API project targeting .net 4.5 and a unit test project targeting .net 4.5.3 it seems that default settings mean nuget may silently update the .net 4.5 project references to incompatible versions one day when you open visual studio and cause your Web API project to fail with the recondite 'Attempt by method 'HttpConfiguration..ctor(HttpRouteCollection)' to access method 'HttpConfiguration.DefaultFormatters()' failed' error.
To avoid the error drop the higher .net version back on the new project to match the Web API project - for this example right click the unit test project, click properties, then change the target framework to .net framework 4.5.
In my case it was a discrepancy between versions of Microsoft.AspNet.WebApi.Client and Microsoft.AspNet.WebApi.Core, I tried updating both to the same version and it worked.
In my case, the issue was solved when I installed the Microsoft.AspNet.WebApi.Core as well. So three libraries should present and be in harmony (uninstall / install) Microsoft.AspNet.WebApi.Client, Microsoft.AspNet.WebApi.Core and Newtonsoft.json
same for the above answers in my case also it is working good after updating or reinstalling packages
Microsoft.AspNet.WebApi.Client
Microsoft.AspNet.WebApi.Core
I'm working on Visual Studio Profesionnal 2010.
In my solution I've got 2 projects
The first is a web site with targeted .net runtime 2.0
the second is a dll with targeted .net runtime 2.0
I add the output of the second as assembly of the first.
I build and rebuild and clean my solution
result : Build succeeded
But when I launch the projet in my web-browser ( in debug or release ).
I've got the Server Error :
This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded
Is there someone who had already the problem?
I think it can be a bug from Visual Studio 2010 but the hotline is very expensive
300€ the phone call.
More Information :
I opended my dll with reflector and saw that mscorlib is referenced 2 times
the first time Version = 2.0
and the second time version = 4.0
Open the .csproj file with text editor (e.g. Notepad) and see the references in there.
If there are references to frameworks higher than 2.0 remove them or change to 2.0 if possible, save and reload the project.
I am pretty sure that this means that you built with asp.net framework 3.5x, but your server only has 3.0x. Update the runtime on the server.
Your server can only support 3.0, Updating the server will resolve the issue..