<PackageReference Include="Microsoft.Packaging.Tools" Version="1.0.0-preview2-25401-01" />

Microsoft.DotNet.Build.Tasks.NuGetUtilities

static class NuGetUtilities
namespace Microsoft.DotNet.Build.Tasks { internal static class NuGetUtilities { public static string GetPackageIdFromSourcePath(string sourcePath); public static void GetPackageParts(string fullPath, out string packageId, out string packageSubPath); } }