Hi @Jipson P J ,
Welcome to Microsoft Q&A forum.
If you are using .NET Framework based project, and there’s a packages.config file in your project. Please open this packages.config file and make sure that the id of the NuGet package is correct. For example:
<packages>
<package id="Microsoft.Web.Infrastructure" version="1.0.0.0" targetFramework="netXXX" />
</packages>
Please also right-click your project > Unload Project > right-click it again > Edit Project File > scroll down and check if this NuGet package was referenced. Make sure that the id/name is correct too.
After that, please click Tools > Options > NuGet Package Manager > General > Clear All NuGet Storage, and restore NuGet Packages(right-click your solution > Restore NuGet Packages).
Feel free to contact us.
Best Regards,
Tianyu
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