public void UpdatePackageSources(IEnumerable <PackageSource> updatedPackageSources)
{
List <PackageSource> packageSourcesBackup = PackageSources.ToList();
try {
PackageSources.Clear();
foreach (PackageSource updatedPackageSource in updatedPackageSources)
{
PackageSources.Add(updatedPackageSource);
}
UpdateActivePackageSource();
} catch (Exception) {
PackageSources.AddRange(packageSourcesBackup);
UpdateActivePackageSource();
throw;
}
}