Upgraded to .NET 10 (#1147)

app/Tests/Models/ContextWindowRuleTests.cs

@@ -53,11 +53,11 @@ public sealed class ContextWindowRuleTests
     {
         var window = provider.GetModelProfile(new Model(modelId, null)).Context;
 
-        Assert.Multiple(() =>
+        using (Assert.EnterMultipleScope())
         {
             Assert.That(window.IsKnown, Is.True);
             Assert.That(window.DefaultTokens, Is.EqualTo(tokens));
-        });
+        }
     }
 
     [Test]
@@ -70,11 +70,11 @@ public sealed class ContextWindowRuleTests
         //
         var profile = ModelRegistry.Shared.Profile(LLMProviders.OPEN_AI, "gpt-5.3");
 
-        Assert.Multiple(() =>
+        using (Assert.EnterMultipleScope())
         {
             Assert.That(profile.Context.IsKnown, Is.False);
             Assert.That(profile.Has(Capability.FUNCTION_CALLING), Is.True, "Everything else it does inherit.");
-        });
+        }
     }
 
     [Test]
@@ -100,10 +100,10 @@ public sealed class ContextWindowRuleTests
         //
         var profile = ModelRegistry.Shared.Profile(LLMProviders.SELF_HOSTED, "some-model-nobody-wrote-a-rule-for");
 
-        Assert.Multiple(() =>
+        using (Assert.EnterMultipleScope())
         {
             Assert.That(profile.Context.IsKnown, Is.False);
             Assert.That(profile.Context.DefaultTokens, Is.Zero, "And the number next to it is meaningless, which is why nothing may read it without asking first.");
-        });
+        }
     }
 }