private static string?GetFileName(IAssemblyReference reference, IModule parent, InputAssembliesGroup input, NuGetFramework framework) { var extensions = reference.IsWindowsRuntime ? new[] { ".winmd", ".dll" } : new[] { ".exe", ".dll" }; if (reference.IsWindowsRuntime) { return(AssemblyHelpers.FindWindowsMetadataFile(reference.Name, reference.Version)); } string?file; if (reference.Name == "mscorlib") { file = GetCorlib(reference); if (!string.IsNullOrWhiteSpace(file)) { return(file); } } file = FindInParentDirectory(reference, parent, extensions); if (!string.IsNullOrWhiteSpace(file)) { return(file); } file = SearchDirectories(reference, input, extensions); return(!string.IsNullOrWhiteSpace(file) ? file : SearchNugetFrameworkDirectories(reference, extensions, framework)); }