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How do you create and publish your own NuGet package from a class library project?

Intermediate

Answer

Set <IsPackable>true</IsPackable> (default for class libraries) along with package metadata (PackageId, Version, Authors, Description) in the .csproj, run `dotnet pack` to produce a .nupkg file, then publish it with `dotnet nuget push` to NuGet.org or a private feed using an API key.
<PropertyGroup>
  <PackageId>MyCompany.Utilities</PackageId>
  <Version>1.2.0</Version>
  <Authors>MyCompany</Authors>
  <Description>Shared utility functions</Description>
</PropertyGroup>

dotnet pack -c Release
dotnet nuget push bin/Release/MyCompany.Utilities.1.2.0.nupkg --api-key <key> --source https://api.nuget.org/v3/index.json
Real-world example A company publishes an internal SharedValidation library to a private Azure Artifacts NuGet feed, letting every internal team consume it via a normal PackageReference instead of copying source code between repositories.

Common follow-ups: How does dotnet pack decide what files to include in the .nupkg?;What's the difference between publishing to NuGet.org versus a private feed?

.NET CLI SDK & Project Structure (csproj);CI/CD Publishing & Deployment
All 15 Assemblies & NuGet questions