Gravatar UrlHelper

GravatarUrlHelper.cs

	public static class GravatarUrlHelper
	{
		public static string GravatarUrl(this UrlHelper urlHelper, string emailAddress, int size = 38, string defaultAvatar = "identicon")
		{
			var md5 = MD5.Create();
			var hash = md5.ComputeHash(Encoding.ASCII.GetBytes(emailAddress.Trim().ToLowerInvariant()));
			return string.Format("https://www.gravatar.com/avatar/{0}?s={1}&d={2}", hash, size, defaultAvatar);
		}
	}