Follow ups for nullable (#23736)

* Follow ups for nullable

* Update src/Http/Routing/src/Matching/DfaMatcherBuilder.cs

Co-authored-by: James Newton-King <[email protected]>

Co-authored-by: James Newton-King <[email protected]>

Author: pranavkm

src/Http/Routing/src/Matching/DfaMatcherBuilder.cs

@@ -247,7 +247,9 @@ public DfaNode BuildDfaTree(bool includeLabel = false)
                                 }
                             }
 
-                            AddLiteralNode(includeLabel, nextParents, parent, requiredValue.ToString());
+                            var literalValue = requiredValue?.ToString() ?? throw new InvalidOperationException($"Required value for literal '{parameterPart.Name}' must evaluate to a non-null string.");
+
+                            AddLiteralNode(includeLabel, nextParents, parent, literalValue);
                         }
                         else if (segment.IsSimple && parameterPart != null)
                         {
@@ -353,7 +355,7 @@ private static int GetPrecedenceDigitAtDepth(RouteEndpoint endpoint, int depth)
             if (segment is null)
             {
                 // Treat "no segment" as high priority. it won't effect the algorithm, but we need to define a sort-order.
-                return 0; 
+                return 0;
             }
 
             return RoutePrecedence.ComputeInboundPrecedenceDigit(endpoint.RoutePattern, segment);
@@ -741,7 +743,7 @@ private void ApplyPolicies(DfaNode node)
             {
                 var nodeBuilder = _nodeBuilders[i];
 
-                // Build a list of each 
+                // Build a list of each
                 List<DfaNode> nextWork;
                 if (previousWork == null)
                 {

src/Security/Authorization/Core/src/AuthorizationServiceCollectionExtensions.cs

@@ -51,6 +51,11 @@ public static IServiceCollection AddAuthorizationCore(this IServiceCollection se
                 throw new ArgumentNullException(nameof(services));
             }
 
+            if (configure == null)
+            {
+                throw new ArgumentNullException(nameof(configure));
+            }
+
             services.Configure(configure);
             return services.AddAuthorizationCore();
         }