Project setup for .net core showing how nuspec will get updated as part of a build

project.nuspec

<?xml version="1.0" encoding="utf-8"?>
<package xmlns="http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd">
    <metadata>
        <id>project</id>
        <version>0.0.1</version>
        <authors>authors</authors>
        <owners>Owners</owners>
        <requireLicenseAcceptance>false</requireLicenseAcceptance>
        <description>package desciptions</description>
    </metadata>
    <files>        
      <file src="file.dll" target="file.dll" />
    </files>
</package>

sample.csproj

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>netstandard2.0</TargetFramework>
    <RootNamespace>ProjectName</RootNamespace>
  </PropertyGroup>

  <ItemGroup>
    <!--removed information -->
  </ItemGroup>
  
 <Target Name="SetNuspecProperties" BeforeTargets="GenerateNuspec">
    <PropertyGroup>
      <NuspecProperties>$(NuspecProperties);id=$(AssemblyName)</NuspecProperties>
      <NuspecProperties>$(NuspecProperties);config=$(Configuration)</NuspecProperties>
      <NuspecProperties>$(NuspecProperties);version=$(PackageVersion)</NuspecProperties>
      <NuspecProperties>$(NuspecProperties);description=$(Description)</NuspecProperties>
      <NuspecProperties>$(NuspecProperties);authors=$(Authors)</NuspecProperties>
    </PropertyGroup>
    <Message Importance="high" Text="NuspecProperties: $(NuspecProperties)" />
  </Target>
</Project>