protected virtual async Task <bool> SpecifiedVersionExists(string version, string packageId)
{
var versionList = await _nuGetService.GetPackageVersionListAsync(packageId);
if (versionList.All(v => !v.Equals(version, StringComparison.OrdinalIgnoreCase)))
{
versionList = await _nuGetService.GetPackageVersionListAsync(packageId, true);
}
return(versionList.Any(v => v.Equals(version, StringComparison.OrdinalIgnoreCase)));
}