Update #42: AD Migration

Refactor to target specific Domain Controllers, with failover.

Disco.Models/Repository/Device/Device.cs

@@ -72,6 +72,9 @@ namespace Disco.Models.Repository
         {
             get
             {
+                if (DeviceDomainId == null)
+                    return null;
+
                 var index = DeviceDomainId.IndexOf('\\');
                 return index < 0 ? DeviceDomainId : DeviceDomainId.Substring(index + 1);
             }
@@ -82,6 +85,9 @@ namespace Disco.Models.Repository
         {
             get
             {
+                if (DeviceDomainId == null)
+                    return null;
+
                 var index = DeviceDomainId.IndexOf('\\');
                 return index < 0 ? null : DeviceDomainId.Substring(0, index);
             }

Disco.Models/Repository/User/User.cs

@@ -66,7 +66,7 @@ namespace Disco.Models.Repository
 
         public void UpdateSelf(User u)
         {
-            if (!this.UserId.Equals(u.UserId, StringComparison.InvariantCultureIgnoreCase))
+            if (!this.UserId.Equals(u.UserId, StringComparison.OrdinalIgnoreCase))
                 throw new ArgumentException("User Id's do not match", "u");
 
             if (this.Surname != u.Surname)