Upgraded to .NET 10 (#1147)

app/Tests/Models/Plugins/DeclaredModelsTests.cs

@@ -49,11 +49,11 @@ public sealed class DeclaredModelsTests
 
         var profile = registry.Profile(LLMProviders.SELF_HOSTED, "acme-assistant-7b");
 
-        Assert.Multiple(() =>
+        using (Assert.EnterMultipleScope())
         {
             Assert.That(profile.Has(Capability.FUNCTION_CALLING), Is.False, "The built-in rule grants this one, and the declaration does not.");
             Assert.That(profile.Reasoning, Is.EqualTo(ReasoningSupport.NONE), "Nor does it reason, whatever the built-in rule says.");
-        });
+        }
     }
 
     [Test]
@@ -83,11 +83,11 @@ public sealed class DeclaredModelsTests
         registry.Declare([]);
         var afterwards = registry.Profile(LLMProviders.SELF_HOSTED, "acme-assistant-7b");
 
-        Assert.Multiple(() =>
+        using (Assert.EnterMultipleScope())
         {
             Assert.That(whileDeclared.Has(Capability.FUNCTION_CALLING), Is.False);
             Assert.That(afterwards.Has(Capability.FUNCTION_CALLING), Is.True);
-        });
+        }
     }
 
     [Test]
@@ -105,11 +105,11 @@ public sealed class DeclaredModelsTests
             Declaring("acme-assistant-7b", MatchKind.EXACT, Capability.TEXT_INPUT | Capability.TEXT_OUTPUT | Capability.MULTIPLE_IMAGE_INPUT),
         ]);
 
-        Assert.Multiple(() =>
+        using (Assert.EnterMultipleScope())
         {
             Assert.That(registry.Profile(LLMProviders.SELF_HOSTED, "acme-assistant-7b").Has(Capability.MULTIPLE_IMAGE_INPUT), Is.True);
             Assert.That(registry.Profile(LLMProviders.SELF_HOSTED, "acme-assistant-3b").Has(Capability.MULTIPLE_IMAGE_INPUT), Is.False);
-        });
+        }
     }
 
     [Test]
@@ -127,11 +127,11 @@ public sealed class DeclaredModelsTests
         {
             registry.Declare([declaration]);
 
-            Assert.Multiple(() =>
+            using (Assert.EnterMultipleScope())
             {
                 Assert.That(registry.Profile(LLMProviders.OPEN_AI, "gpt-5.1").Has(Capability.VIDEO_INPUT), Is.True);
                 Assert.That(registry.Profile(LLMProviders.OPEN_ROUTER, "openai/gpt-5.1").Has(Capability.VIDEO_INPUT), Is.True, "The same model, reached through a gateway which wraps the name.");
-            });
+            }
         }
         finally
         {

app/Tests/Models/Plugins/ModelDeclarationTests.cs

@@ -56,7 +56,7 @@ public sealed class ModelDeclarationTests
         var declaration = await ReadAsync(A_COMPLETE_DECLARATION);
 
         Assert.That(declaration, Is.Not.Null);
-        Assert.Multiple(() =>
+        using (Assert.EnterMultipleScope())
         {
             Assert.That(declaration!.Pattern.Text, Is.EqualTo("acme-assistant"));
             Assert.That(declaration.Pattern.Kind, Is.EqualTo(MatchKind.PREFIX));
@@ -68,7 +68,7 @@ public sealed class ModelDeclarationTests
             Assert.That(declaration.Change.Images, Is.EqualTo(new ImageLimits(1, 8)));
             Assert.That(declaration.Source.CheckedOn, Is.EqualTo(new DateOnly(2026, 9, 12)));
             Assert.That(declaration.EnterpriseConfigurationPluginId, Is.EqualTo(PLUGIN_ID));
-        });
+        }
     }
 
     [Test]
@@ -77,7 +77,7 @@ public sealed class ModelDeclarationTests
         var declaration = await ReadAsync(THE_LEAST_A_DECLARATION_CAN_SAY);
 
         Assert.That(declaration, Is.Not.Null);
-        Assert.Multiple(() =>
+        using (Assert.EnterMultipleScope())
         {
             Assert.That(declaration!.Pattern.Kind, Is.EqualTo(MatchKind.SEGMENT), "The kind to reach for by default, here as everywhere else.");
             Assert.That(declaration.Change.Reasoning, Is.EqualTo(ReasoningSupport.NONE));
@@ -85,7 +85,7 @@ public sealed class ModelDeclarationTests
             Assert.That(declaration.Change.Context, Is.Null);
             Assert.That(declaration.Change.Tokenizer, Is.Null);
             Assert.That(declaration.Change.Images, Is.Null);
-        });
+        }
     }
 
     [Test]
@@ -199,11 +199,11 @@ public sealed class ModelDeclarationTests
         var theSameNames = await ReadAsync(A_COMPLETE_DECLARATION.Replace("""["CONTEXT_WINDOW"] = 131072,""", """["CONTEXT_WINDOW"] = 65536,""", StringComparison.Ordinal));
         var otherNames = await ReadAsync(A_COMPLETE_DECLARATION.Replace("""["MATCH"] = "PREFIX",""", """["MATCH"] = "SEGMENT",""", StringComparison.Ordinal));
 
-        Assert.Multiple(() =>
+        using (Assert.EnterMultipleScope())
         {
             Assert.That(theSameNames?.Id, Is.EqualTo(declaration?.Id), "The same pattern, so one of the two has to win.");
             Assert.That(otherNames?.Id, Is.Not.EqualTo(declaration?.Id), "Bound to the name differently, so they claim different sets of names.");
-        });
+        }
     }
 
     private static async Task<ModelDeclaration?> ReadAsync(string entry)