private void SetWinMDMetadata()

in src/Microsoft.NuGet.Build.Tasks/ResolveNuGetPackageAssets.cs [393:448]
29 lines of code
6 McCabe index (conditional complexity)

        private void SetWinMDMetadata(IEnumerable<ITaskItem> runtimeWinMDs, ICollection<string> candidateImplementations)
        {
            foreach (var winMD in runtimeWinMDs.Where(w => _fileExists(w.ItemSpec)))
            {
                string imageRuntimeVersion = _tryGetRuntimeVersion(winMD.ItemSpec);

                if (String.IsNullOrEmpty(imageRuntimeVersion))
                    continue;

                // RAR sets ImageRuntime for everything but the only dependencies we're aware of are 
                // for WinMDs
                winMD.SetMetadata(ReferenceImageRuntimeMetadata, imageRuntimeVersion);

                bool isWinMD, isManaged;
                TryParseRuntimeVersion(imageRuntimeVersion, out isWinMD, out isManaged);

                if (isWinMD)
                {
                    winMD.SetMetadata(ReferenceWinMDFileMetadata, "true");

                    if (isManaged)
                    {
                        winMD.SetMetadata(ReferenceWinMDFileTypeMetadata, WinMDFileTypeManaged);
                    }
                    else
                    {
                        winMD.SetMetadata(ReferenceWinMDFileTypeMetadata, WinMDFileTypeNative);

                        // Normally RAR will expect the native DLL to be next to the WinMD, but that doesn't
                        // work well for nuget packages since compile time assets cannot be architecture specific.
                        // We also explicitly set all compile time assets to not copy local so we need to 
                        // make sure that this metadata is set on the runtime asset.

                        // Examine all runtime assets that are native winmds and add Implementation metadata
                        // We intentionally permit this to cross package boundaries to support cases where
                        // folks want to split their architecture specific implementations into runtime
                        // specific packages.

                        // Sample layout            
                        // lib\netcore50\Contoso.Controls.winmd
                        // lib\netcore50\Contoso.Controls.xml
                        // runtimes\win10-arm\native\Contoso.Controls.dll
                        // runtimes\win10-x64\native\Contoso.Controls.dll
                        // runtimes\win10-x86\native\Contoso.Controls.dll

                        string fileName = Path.GetFileNameWithoutExtension(winMD.ItemSpec);

                        // determine if we have a Native WinMD that could be satisfied by this native dll.
                        if (candidateImplementations.Contains(fileName))
                        {
                            winMD.SetMetadata(ReferenceImplementationMetadata, fileName + ".dll");
                        }
                    }
                }
            }
        }