How to load a DKIM public key from a string

dkim-pubkey.cs

using System;
using System.IO;

using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.OpenSsl;

namespace DkimKeyLocatorExample
{
	public class Program
	{
		public static void Main (string[] args)
		{
			string gmailDkimKey = @"-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA1Kd87/UeJjenpabgbFwh+
eBCsSTrqmwIYYvywlbhbqoo2DymndFkbjOVIPIldNs/m40KF+yzMn1skyoxcTUGCQs8g3FgD2A
p3ZB5DekAo5wMmk4wimDO+U8QzI3SD07y2+07wlNWwIt8svnxgdxGkVbbhzY8i+RQ9DpSVpPbF
7ykQxtKXkv/ahW3KjViiAH+ghvvIhkx4xYSIc9oSwVmAl5OctMEeWUwg8Istjqz8BZeTWbf41f
bNhte7Y+YqZOwq1Sd0DbvYAD9NOZK9vlfuac0598HY+vtSBczUiKERHv1yRbcaQtZFh5wtiRrN
04BLUTD21MycBX5jYchHjPY/wIDAQAB
-----END PUBLIC KEY-----
";
			AsymmetricKeyParameter key;
			
			using (var stream = new StringReader (gmailDkimKey)) {
				var reader = new PemReader (stream);
				
				key = reader.ReadObject () as AsymmetricKeyParameter;
			}
			
			Console.WriteLine (key);
		}
	}
}