How to resolve Could not load file or assembly 'Azure.Core'

Question

Could any one explain why we are getting such errors like Could not load file or assembly. Whenever I update nuget references specially in azure sdk I end up with this error and because of lack of knowledge I was struggling to fix them very weirdly. Could you please explain this error ? I mean I can digest this error but I couldn't find the real solution for that.

I have clearly decided that I will understand this error and get to more on this platform. If you could explain this step by step, that would increase my knowledge with core productivity.

I have very limited knowledge about this type of error that we need add some code in web.config file.

<bindingRedirect oldVersion="0.0.0.0-0.0.0.1" newVersion="0.0.0.1" />

But to be very honest I don't know how to decide which version need be replace with old and new version. I have recently added Azure.Identity nuget to my project.

  <ItemGroup>
    <PackageReference Include="Azure.Identity" Version="1.5.0" />
    <PackageReference Include="Azure.Storage.Blobs" Version="12.10.0" />
 </ItemGroup>

For Example now I been struggling with this error.

System.IO.FileLoadException
HResult=0x80131040
Message=Could not load file or assembly 'Azure.Core, Version=1.19.0.0, Culture=neutral, 
PublicKeyToken=92742159e12e44c8' or one of its dependencies. The located assembly's 
manifest definition does not match the assembly reference. (Exception from HRESULT: 
0x80131040)
Source=Azure.Storage.Blobs
StackTrace:

I know where to change to solve this error but don't know what to change.

Please search this site for `[c#] could not load file or assembly or one of its dependencies`, which has more than 4,000 results. — Ken White, Jan 04 '22 at 21:56
Thank you Stuartd for posting this URL https://nickcraver.com/blog/2020/02/11/binding-redirects/ — Pramod Lawate, Jan 05 '22 at 09:53

score 12 · Accepted Answer · edited Jul 15 '23 at 20:43

12

I have been reading this url binding-redirects content and got to know about a lot more new knowledge. I have fixed this error by adding below xml into my web.config file.

<dependentAssembly>
    <assemblyIdentity name="Azure.Core" publicKeyToken="92742159e12e44c8" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-1.20.0.0" newVersion="1.20.0.0" />
</dependentAssembly>

in order to deal with this error this portal really helpful https://nuget.info/packages/Azure.Core/1.20.0

Note: Sometimes the Nuget version is not the assembly version. So be careful.

edited Jul 15 '23 at 20:43

Rob Sedgwick

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answered Jan 05 '22 at 09:58

Pramod Lawate

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please accept this as an answer. so that others who encounter the same issue can find this solution and fix their problem. – Delliganesh Sevanesan Jan 05 '22 at 10:33
How would I accept this as an answer ? I can't its says You can't accept your own. – Pramod Lawate Jan 05 '22 at 11:20
You have to wait for 48 hours (The question must be older than 48 hours). Refer [here](https://meta.stackexchange.com/questions/5234/how-does-accepting-an-answer-work) – Delliganesh Sevanesan Jan 05 '22 at 11:42
ok Than you for sharing this with me. – Pramod Lawate Jan 05 '22 at 11:59

score 1 · Answer 2 · answered Jan 16 '23 at 17:33

Just in case someone else finds this useful. I had the error in the live environment but all was okay in the development environment.

Simply put I had failed to update the web.config file in the live environment with the newly created assembly bindings from the development environment.

Thank you Pramod for your answer, it sent me in the right direction to resolve my issue.

score 0 · Answer 3 · answered Aug 22 '23 at 13:02

0

In my case, I have updated asp.net 5 to asp.net 6 and didn't update program.cs to replace IHostBuilder with WebApplication During the start asp.net 6 in production, I was getting exceptions that the application couldn't load the assembly.

https://gist.github.com/davidfowl/0e0372c3c1d895c3ce195ba983b1e03d#changing-the-content-root-application-name-and-environment

answered Aug 22 '23 at 13:02

Libor Weigl

1

As it’s currently written, your answer is unclear. Please [edit] to add additional details that will help others understand how this addresses the question asked. You can find more information on how to write good answers [in the help center](/help/how-to-answer). – Community Aug 25 '23 at 11:10

How to resolve Could not load file or assembly 'Azure.Core'

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