使用C#代码下载.nupkg 包

代码：

 1         public static async Task DownloadAsync(string packageId, string version)
 2         {
 3             var package = new PackageIdentity(packageId, NuGetVersion.Parse(version));
 4 
 5             var settings = Settings.LoadDefaultSettings(null);
 6             var globalFolder = SettingsUtility.GetGlobalPackagesFolder(settings);
 7 
 8             var logger = NullLogger.Instance;
 9             var cancelToken = CancellationToken.None;
10 
11             var sourceRepositoryProvider = new SourceRepositoryProvider(settings, Repository.Provider.GetCoreV3());
12             var downloadFolder = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Download");
13             using (var cacheContext = new SourceCacheContext())
14             {
15                 var downloadContext = new PackageDownloadContext(cacheContext, downloadFolder, true);
16 
17                 var repositories = sourceRepositoryProvider.GetRepositories();
18                 foreach (var repository in repositories)
19                 {
20                     var downloadResult = await PackageDownloader.GetDownloadResourceResultAsync(repository,
21                                                                                                 package,
22                                                                                                 downloadContext,
23                                                                                                 globalFolder,
24                                                                                                 logger,
25                                                                                                 cancelToken);
26 
27                     if (downloadResult != null)
28                     {
29                         var downloadFile = $@" {downloadFolder} \ {package.Id} . {package.Version} .nupkg";
30 
31                         using (var fileStream = File.Create(downloadFile))
32                         {
33                             downloadResult.PackageStream.Seek(0, SeekOrigin.Begin);
34                             await downloadResult.PackageStream.CopyToAsync(fileStream);
35                         }
36 
37                         break;
38                     }
39                 }
40             }
41         }