Net Framework 4.0 V 30319
Latrina Cobbett
I just downloaded the .NET Framework 4.6 offline installer and it recognized the installation and gave me the option to repair or remove it. I opted to repair the installation and but it didn't fix anything.
The UnhandledExcepton module is a third party piece of code, the source of which is in CodePlex. It's purpose is to catch exceptions that are not handled and log them somewhere. It can be useful therefore removing it is not really the answer to this problem.
Also, creating an event log source of 'ASP.NET 4.6.81.0' is not really a fix. It might get you past the problem shown here but it will most likely break again the next time the .NET framework is updated.
If you look in the source code you can see that the module is using the version of an assembly (WebEngine.dll) shipped with the .NET framework to find the name of the event log source to use. The file can be found in the runtime directory which will depend on the framework version and the "bitness". e.g.
The reason this is happening now is that .NET 4.6 is a replacement for .NET 4.5 rather than a side-by-side install. The installation has replaced the WebEngine.dll with a new version, 4.6.81.0. The previous version in .NET 4.5.2 was 4.0.30319 (which corresponded with the CLR version).
If the string that looked for the environment version instead used this then it would continue to work with framework 4.6. Of course this does not guarantee it will continue to work in later versions however it would be a safer choice than file versions.
UPDATE 2015-DEC-04: I have patched this issue and have uploaded a new version of the offending class to the original codeplex site. The original author does not seem to be active on the site any more and therefore I do not expect the patch to get merged into the source control however it is there for anyone to use. See the issue describing the problem and the linked patch
As previously announced, starting January 12, 2016 Microsoft will no longer provide security updates, technical support or hotfixes for .NET 4, 4.5, and 4.5.1 frameworks. All other framework versions, including 3.5, 4.5.2, 4.6 and 4.6.1, will be supported for the duration of their established lifecycle. The decision to end support for these versions will allow us to invest more resources towards improvements of the .NET Framework.
You should ensure that a supported version of the .NET Framework is installed in your environment, on Windows desktops and servers. This includes Azure and other cloud service deployments. See more information on Azure deployments below.
The Azure team announced they will be making updated images available with the .NET Framework 4.5.2 for guest OS families 2.x, 3.x and 4.x, in order to support apps deployed to Azure. These updated images were available for manual deployment in November and are available for automatic deployment in January. The Additional Information section below has more information.
Multiple versions of the .NET framework can be installed on a machine. The registry can be used to determine if the .NET Framework version 4.5.2 or later has been installed. You will need administrative credentials to read the registry with regedit.
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.NET 4.5.2, 4.6 and 4.6.1 are compatible, in-place updates on top of .NET 4, .NET 4.5, and .NET 4.5.1. This means that applications built to target any of these previous .NET 4.x versions will continue running on .NET 4.5.2 without change. No recompiling of apps is necessary.
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Microsoft products such as Exchange Server, Dynamics CRM, SharePoint, and Lync are built on top of .NET. Do I need to make any updates to these products if they are using .NET 4, 4.5 or 4.5.1?
Newer versions of products such as Exchange, Dynamics CRM, Sharepoint, and Lync are based on the .NET 4 or .NET 4.5. Even a large software application such as Exchange that was built using .NET 4 will continue to run without any changes when it runs on .NET 4.5.2 or later. That said, we recommend you validate your deployment by updating .NET to .NET 4.5.2 in a QA/pre-production environment first before rolling this out to a production environment.
On November 10, 2015 Azure announced that they will update the .NET Framework in Windows Azure Guest operating system (Guest OS) family 2.x, 3.x and 4.x to .NET Framework 4.5.2 in the January 2016 Guest OS Release. Cloud services running on Guest OS family 2.x, 3.x and 4.x with automatic updates enabled will be updated to the January 2016 Guest OS with .NET Framework 4.5.2. In order to help customers validate their cloud service with .NET 4.5.2, Azure will provide a second set of November OS Versions 201511-02 for with .NET 4.5.2 for manual deployment. If you have any questions or require further information, please use one of the support options to contact Azure.
change made to both files was the same just added 1 line entry and after that I have been getting this error on multiple programs, including skype, skype starts succesfully itelf but as it seems one of its services fails to start. I searched but didnt find any installer so I can repair this specific version of .net framework. any help would be appreciated thanks. Another thing to note is that I undid those changes and now both config files are back in their default condition but I am still getting this error.
I have the same problem with Download assistant. I have .network 3.5 and 4.8 installed on a Windows 10 machine. Cannot install .net v4.0 as I have a later version installed. Why should I have to revert my .net framework version and possibly cause problems with other applications?
This problem has obviously been around for more than 2 years - what rubbish!
This will scan for damaged Windows files and replace them where possible. Let it run till the end and it will tell you if it found corrupted files and whether it was able to repair them or not.
I suggest running the sfc command twice as it sometimes finds more damage after the first pass.
.NET Framework is a software framework developed by Microsoftthat runs primarily on Microsoft Windows. It includes a large class library called Framework ClassLibrary (FCL) and provides language interoperability across several programming languages.
The error message is clearly inadequate because the framework version was not the issue. But because this question is the first hit you get when you search that error message this answer will hopefully prove useful to someone else.
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Herein, we report the synthesis of 4-carboxyl-quinoline linked COFs (QL-COFs) via three-component Doebner reactions (Fig. 1). Owing to the reversible-irreversible sequence of the Doebner reaction mechanism, the aldehydes, amines monomers and pyruvic acid were assembled to give crystalline and porous framework products. QL-COFs can also be constructed by the linkage conversion from imine COFs. It is noted that the construction of QL-COFs possessed the potential to be extended to most of the imine family. Moreover, the 4-carboxyl-quinoline linkage endowed QL-COFs interesting characteristics including the contractive pore size, superior chemical stability and increased hydrophilicity. On this basis, QL-COF membranes were applied to the selective ion sieving and dye separation by nanofiltration, exhibiting remarkable size selectivity, high water permeance and durability in extreme conditions.
Since the diverse preparation methods and broad application prospects of imine COFs, it is of great potential to develop PSM method for imine COFs. Moreover, it is easy to control the conversion rate via the PSM method by regulating the amount of reactants, which enables the accurate functional regulation of COFs materials. Considering the reversible-irreversible mechanism of Doebner reaction, the stepwise synthesis of QL-COF-1 through the PSM method can also be expected. We further carried out the synthesis of QL-COF-1 (named QL-COF-1-PSM) via the linkage conversion method from as-synthesized imine-linked TPB-TP-COF. The product obtained in the same reaction conditions as the OP method exhibited poor crystallinity (Supplementary Fig. 7). We speculate that the original crystalline framework structure of imine COFs would be partially destructed due to the structural distortion caused by the nucleophilic attack of pyruvic acid and the subsequent cyclization process, which led to the poor crystallinity.The presence of water in the reaction system could increase the reversibility of the imine linkages of COFs, which enables the rearrangement of amorphous polymer into crystalline structures31, therefore, we tried to substitute aqueous acetic acid for glacial acetic acid in the reaction system. As expected, the obtained PSM conversion product showed a high crystallinity. However, FT-IR spectrum indicated a poor conversion rate of imine linkage (Supplementary Fig. 7). Considering enol pyruvic acid is the active species for nucleophilic attack on imine in the Doebner reaction (Fig. 1a), the lower conversion of imine should be attributed to the weak acidity of aqueous acetic acid which is not conducive to the conversion of keto-enol form of pyruvic acid. Therefore, we further introduced p-toluenesulfonic acid (TsOH) into the reaction. On the one hand, the enhancement of the acidity of the reaction system is conducive to formation of enol pyruvate acid, on the other hand, the protonation rate of imine was increased, which were conducive to the nucleophilic addition of pyruvate acid to the imine carbon. In addition, oxygen was still the most suitable oxidation aromatization as same as OP method.
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