# Could not load file or assembly X or one of its dependencies.

In Visual Studio;

* Solution Explorer-Project-Properties-Application.
    

Check "**Auto-Generate binding redirects**"

When this is selected, versions are specified in the web.config file after the Nuget package updates.

**When is binding necessary?**

If there is more than one of the same dll, it determines which version of this dll the project will use.

Nuget Package Management: In old projects, packages.config was used. **PackageReference** is now used in new projects.

Visual Studio - Tools - Nuget Package Manager - Package Manager Settings Nuget Package Manager - General - Under Package Management. Select Default package management format to : **PackageReference**

**Information in Visual Studio Output :**

Consider app.config remapping of assembly "**Google.Apis**, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab" from Version "1.67.0.0" \[\] to Version "1.68.0.0" \[C:\\Users\\Ferhat.nuget\\packages\\google.apis\\1.68.0\\lib\\net462\\Google.Apis.dll\] to solve conflict and get rid of warning.

Consider app.config remapping of assembly "**Google.Apis.Auth**, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab" from Version "1.67.0.0" \[\] to Version "1.68.0.0" \[C:\\Users\\Ferhat.nuget\\packages\\google.apis.auth\\1.68.0\\lib\\net462\\Google.Apis.Auth.dll\] to solve conflict and get rid of warning.

Consider app.config remapping of assembly "**Google.Apis.Core**, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab" from Version "1.67.0.0" \[\] to Version "1.68.0.0" \[C:\\Users\\Ferhat.nuget\\packages\\google.apis.core\\1.68.0\\lib\\net462\\Google.Apis.Core.dll\] to solve conflict and get rid of warning.

Consider app.config remapping of assembly "**System.Runtime.CompilerServices.Unsafe**, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" from Version "4.0.4.1" \[\] to Version "6.0.0.0" \[C:\\Users\\Ferhat.nuget\\packages\\system.runtime.compilerservices.unsafe\\6.0.0\\lib\\net461\\System.Runtime.CompilerServices.Unsafe.dll\] to solve conflict and get rid of warning.

C:\\Program Files\\Microsoft Visual Studio\\2022\\Community\\MSBuild\\Current\\Bin\\amd64\\Microsoft.Common.CurrentVersion.targets(2401,5): warning MSB3247: Found conflicts between different versions of the same dependent assembly. In Visual Studio, double-click this warning (or select it and press Enter) to fix the conflicts; otherwise, **add the following binding redirects to the "runtime" node in the application configuration file**:

```xml
	<runtime>
		<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
			<dependentAssembly>
				<assemblyIdentity name="Google.Apis" culture="neutral" publicKeyToken="4b01fa6e34db77ab" />
				<bindingRedirect oldVersion="0.0.0.0-1.68.0.0" newVersion="1.68.0.0" />
			</dependentAssembly>
		</assemblyBinding>
		<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
			<dependentAssembly>
				<assemblyIdentity name="Google.Apis.Auth" culture="neutral" publicKeyToken="4b01fa6e34db77ab" />
				<bindingRedirect oldVersion="0.0.0.0-1.68.0.0" newVersion="1.68.0.0" />
			</dependentAssembly>
		</assemblyBinding>
		<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
			<dependentAssembly>
				<assemblyIdentity name="Google.Apis.Core" culture="neutral" publicKeyToken="4b01fa6e34db77ab" />
				<bindingRedirect oldVersion="0.0.0.0-1.68.0.0" newVersion="1.68.0.0" />
			</dependentAssembly>
		</assemblyBinding>
		<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
			<dependentAssembly>
				<assemblyIdentity name="System.Runtime.CompilerServices.Unsafe" culture="neutral" publicKeyToken="b03f5f7f11d50a3a" />
				<bindingRedirect oldVersion="0.0.0.0-6.0.0.0" newVersion="6.0.0.0" />
			</dependentAssembly>
		</assemblyBinding>
	</runtime>
</configuration>
```

Resource :

[https://weblog.west-wind.com/posts/2014/Nov/29/Updating-Assembly-Redirects-with-NuGet](https://weblog.west-wind.com/posts/2014/Nov/29/Updating-Assembly-Redirects-with-NuGet)

[https://learn.microsoft.com/en-us/dotnet/framework/configure-apps/how-to-enable-and-disable-automatic-binding-redirection](https://learn.microsoft.com/en-us/dotnet/framework/configure-apps/how-to-enable-and-disable-automatic-binding-redirection)