Error check site by id.

letsencrypt-win-simple/Program.cs

@@ -387,6 +387,7 @@ static string GetIssuerCertificate(CertificateRequest certificate)
      </system.webServer>
  </configuration>";
 
+        // all this would do is move the handler to the bottom, which is the last place you want it.
         //<handlers>
         //    <remove name = "StaticFile" />
         //    < add name="StaticFile" path="*." verb="*" type="" modules="StaticFileModule,DefaultDocumentModule,DirectoryListingModule" scriptProcessor="" resourceType="Either" requireAccess="Read" allowPathInfo="false" preCondition="" responseBufferLimit="4194304" />
@@ -414,14 +415,9 @@ static AuthorizationState Authorize(string dnsIdentifier, string webRootPath)
             try
             {
                 Console.WriteLine(" Submitting answer");
-                // This always throws throw new InvalidOperationException("challenge answer has not been generated"); because the authoState.Challenge list isn't changing for some reason
-
                 authzState.Challenges = new AuthorizeChallenge[] { challenge };
                 client.SubmitAuthorizeChallengeAnswer(authzState, AcmeProtocol.CHALLENGE_TYPE_HTTP, true);
 
-                // so I pulled the core of SubmitAuthorizeChallengeAnswer into it's own method that I can call directly
-                //client.SubmitAuthorizeChallengeAnswer(challenge, true);
-
                 // have to loop to wait for server to stop being pending.
                 // TODO: put timeout/retry limit in this loop
                 while (authzState.Status == "pending")

letsencrypt-win-simple/SiteHost.cs

@@ -10,7 +10,12 @@ public class TargetBinding
 
         public Site GetSite(ServerManager iisManager)
         {
-            return iisManager.Sites[(int)SiteId];
+            foreach (var site in iisManager.Sites)
+            {
+                if (site.Id == SiteId)
+                    return site;
+            }
+            throw new System.Exception($"Unable to find IIS site ID #{SiteId} for binding {this}");
         }
 
         public string GetPhysicalPath(ServerManager iisManager)