How to resolve runtime assembly binding issue

Question

I have some class libraries and to service projects that I am hosting as a service.

This is an old .net framework service and library.

The framework is 4.7.2 and I am utilizing Azure.Communication.Email 1.0.1 and have upgraded all dependent packages.

However, I am facing a lot of issues with dependent library

Eg.:

Message: Could not load file or assembly 'System.Diagnostics.DiagnosticSource, Version=6.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

I have a project titled common that is going to send the actual emails where this azure package and dependent packages are installed. How to resolve this, how should I approach to fix these issues.

Installed packages:

Did you add the System.Diagnostics.DiagnosticsSource NuGet package? — Panagiotis Kanavos
– Panagiotis Kanavos, Commented Sep 12 at 15:27
I have attached all the packages that I installed in the question. I even tried to install all the packages in both class library(common) as well as the service project. — RandomUser
– RandomUser, Commented Sep 12 at 15:31

Robert · Accepted Answer · 2025-10-01 08:05:44Z

0

Is the dll file in build output?
Is it in correct version?

What version do you see in references when you check you dll's/exe's manifest?
Checking above might help you troubleshoot, additionally I can recommend trying out this tool: https://github.com/awaescher/Fusion

answered Oct 1 at 8:05

Robert

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