Final answer:
To create a NuGet package in .NET Core, update your project's .csproj file with package details, build the project, use 'dotnet pack' command to generate the package, and then use the 'dotnet nuget push' command to publish it to the NuGet Gallery.
Step-by-step explanation:
To create a NuGet package in .NET Core, you should follow a series of steps. First, you need to ensure you have a library project that you want to package. Open the project in Visual Studio or similar IDE and update the project's .csproj file to include the necessary details for the package, such as version, authors, and description.
Next, build your project to ensure that it compiles correctly. You can use the dotnet pack command to generate the NuGet package. By default, this command generates a new package every time it is run. It's useful to specify a -Configuration flag if you want a release build, for instance. If the pack operation is successful, it will create a .nupkg file in the bin/ or obj/ directory, depending on how you have configured the output path.
Finally, you can publish your package to the NuGet Gallery using the dotnet nuget push command. You'll need to obtain an API key from the NuGet website to authenticate your identity when you push the package. It's important that your package complies with the NuGet's package acceptance criteria before attempting to publish it.
Remember that creating NuGet packages with .NET Core enables you to share reusable components across different projects and with other developers, so pay attention to proper versioning and clear documentation for best practices.