/// <summary>
/// It will retrive or create a new Digest for the given Uri.
/// </summary>
/// <param name="uri"></param>
/// <returns></returns>
public static Digest GetOrCreate(Uri uri)
{
lock (Locker)
{
Digest digest = null;
if (!Digests.TryGetValue(uri.Host, out digest))
Digests.Add(uri.Host, digest = new Digest(uri));
return digest;
}
}