I've built a windows service code with Framework Verison 4.0, when I sent my service.exe for instllation at different machine which has version 2.0 installed it gave error:
"Exception occurred while initializing installation:
System.BadImageFormatException: couls not load file or assembly '\service.exe' or one of its
dependencies. This assembly is built by a runtime newer than currently loaded runtime and cannot be loaded"
How can I build a service which is backward compatible in visual studio
Change your target framework to 2.0, and make sure you do not use anything that's not part of 2.0 (e.g. TPL, etc), otherwise, install .NET 4 on the target machines
You cannot run .NET v4.0 code in .NET v2.0 runtime. Either install .NET v4.0 on the server or convert your servive to .NET v2.0
When you have a .net framework 4.0 installed then you can run any application which has a target framework value as 2.0 , 3.0 , 3.5 and 4.0
and when you have a .net framework 3.5 installed then you can run any application which has target framework value as 2.0 , 3.0 and 3.5 , like this it goes on.
This is mandatory requirement for .net framework , so it would be better if you ask your client to install .net framework 4.0 or create a service (i hope this is windows service and not wcf service because wcf is supported only from framework version 3.0) project which targets the framework version 2.0.
Related
We have a C# project and in Visual Studio the according "Target framework" is currently set to ".NET Framework 4.5". We have a second client library (written in C++) that calls this C# library to do something. For some new features we want to use the framework 4.6.1+. But we don't worn that C# project directly.
So some question in mind:
Generally, if we upgrade "Target framework" to .NET Framework 4.6.1 and on the machines where our app is running the actual framework is pre 4.6.1 (e.g., 4.5). What will happen? Will it throw some exception when the app is started?
If we stick to .NET Framework 4.5 as the target version, is there an option to automatically use the latest version actually installed on the machine where the app is run?
Thanks.
on the machines where our app is running the actual framework is pre 4.6.1 (e.g., 4.5). What will happen? Will it throw some exception when the app is started?
It will not throw an exception when the app started... The only time it could throw an exception is if (and when) your library calls a method that exists in .NET 4.6.1 but does not exist in .NET 4.5... You will get a MissingMethodException, other than that everything should work fine.
Something you can do is inspect what is the .NET Framework that is being run in the process that loaded your library.
string version = AppDomain.CurrentDomain.SetupInformation.TargetFrameworkName;
You can do that at the very start of the method being called in the library. And if the .NET Framework is < 4.6.1 you can decide what to do... Show an error message, or change the behavior as to not call into some functions (and avoid MissingMethodException).
One more thing you can also do determine which .NET Framework versions are installed on the machine and make some decisions on what to do.
.NET Framework 4.5+ is backward compatible. If app will be 4.6.1, but OS will have 4.5 then application error is possible (no forward compatibility). Documentation about version compatibility says:
By default, an app runs on the version of .NET Framework that it was
built for. If that version isn't present and the app configuration
file doesn't define supported versions, a .NET Framework
initialization error may occur. In this case, the attempt to run the
app will fail.
We recently need to upgrade our build server from Windows server 2008 to 2016. Because 08 is fading out
As we all know, Windows Server 2016 is installed with .NET Framework 4.6 and from https://learn.microsoft.com/en-us/dotnet/framework/install/on-windows-10
You can only have one version of the .NET Framework 4.x installed on your machine.
You cannot install an earlier version of the .NET Framework on your machine if a later version is already installed.
The case is, we have many projects using
.NET 4.0 with EF 4.4.0.0
.NET 4.5 with EF 5.0.0.0
And some classes such as System.ComponentModel.DataAnnotations.Schema.ColumnAttribute had moved from EF to .NET from EF 4.4.0.0 to .NET 4.5 along the upgrade.
Therefore, missing .NET 4.0 results in:
error CS0433: The type
'System.ComponentModel.DataAnnotations.Schema.ColumnAttribute' exists
in both ...\workspace\....\EntityFramework.dll and
...\Windows\Microsoft.NET\assembly\GAC_MSIL\System.ComponentModel.DataAnnotations\v4.0_4.0.0.0__31bf3856ad364e35\System.ComponentModel.DataAnnotations.dll'
because it trys to use .NET 4.5 with EF 4.4.0.0.
My question is: we don't have resources to ask QA teams to have a full test on every aspects of our applications, but we do need to use the new build server. Do you guys have any other idea / thought thats worth trying so that the it can build?
I have few C# projects which requires .net framework 4.0 msbuild.exe
"C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe" to build the project.
But now i have one c# project which requires .net framework 4.6 msbuild.exe.
So i installed following components:
• Microsoft .NET Framework 4.6
• Microsoft .NET Framework 4.6 Targeting Pack
• Microsoft Build Tools 2015
pointed my msbuild to "C:\Program Files (x86)\MSBuild\14.0\Bin\MSBuild.exe".
But when i'm installing .net framework 4.6 it upgrades 4.0 so i'm facing issues while building .NET 4.0 Framework apps.
So is it possible to build 4.0 apps with 4.6 msbuild.exe?
The .net framework can only have one installation on each PC for each major version - i.e. 4.*.
The different versions of msbuild are associated with the ms tools version.
The .net 4.6 is a drop in replacement for .net 4.0, so you cannot have both installed, they use the same directory.
You can configure a jenkins slave machine which has the .net 4.0 framework on it, and mark the builds which require .net 4.0 to run on it.
See https://wiki.jenkins-ci.org/display/JENKINS/Step+by+step+guide+to+set+up+master+and+slave+machines
I am trying to change the target framework from 4.5 to 4.0, I have changed the target framework on all of my projects and I have created a testing build with VS2015.
I am trying to run the app in WIN7 with .NET 4.0 installed but the app crashes and the errors are System.IO.FileLoadException for mscorlib.dll and PresentationFramework.dll
Does anyone know how to fix it?
More info
I have tried also:
to build with vs2012 but I cannot use vs2010 because I am using async from BCL package
to create new solution with new projects to target from the start 4.0 framework.
I guess the problem is try to run a .NET 4.5 in WIndows 7, which per default utilizes .NET 4.0.
Choose: or to install .NET 4.5 in WIndows 7 (I don't know if it's possible) or downgrade your project to NET 4.
For anyone out there that may have the same problem, be sure that you have installed the latest update for .NET framework, it worked after I have installed the update kb2468871
We have one legacy .net winform application which we have updated to .net framework 4.0. And now i can see that all assemblies with latest version. But somehow to run this application in production environment requires .NET framework 1.1 to be installed on client machine.
Also checked all referenced assemblies using ILDASM tool and those are also not using any .NET 1.0 assembly file.
So Is there any way to check why this application still requires .NET Framework 1.1 to be installed?