public async Task DownloadPackageManifest()
{
// Downloads a package manifest (.nuspec)
NuGetClient client = new NuGetClient("https://api.nuget.org/v3/index.json");
string packageId = "Newtonsoft.Json";
NuGetVersion packageVersion = new NuGetVersion("12.0.1");
using (Stream manifestStream = await client.GetPackageManifestStreamAsync(packageId, packageVersion))
{
Console.WriteLine($"Downloaded package {packageId} {packageVersion}'s nuspec");
}
}