Fix test

Author: bahusoid

src/NHibernate.Test/NHSpecificTest/GH3306NullableEntityCorrelatedSubquery/Fixture.cs

@@ -11,40 +11,47 @@ public class Fixture : BugTestCase
 
 		protected override void OnSetUp()
 		{
-			using var session = OpenSession();
-			using var tx = session.BeginTransaction();
-			var joe = new Customer {Name = NAME_JOE};
-			session.Save(joe);
+			using (var session = OpenSession())
+			using (var tx = session.BeginTransaction())
+			{
+				var joe = new Customer { Name = NAME_JOE };
+				session.Save(joe);
 
-			var allen = new Customer {Name = NAME_ALLEN};
-			session.Save(allen);
+				var allen = new Customer { Name = NAME_ALLEN };
+				session.Save(allen);
 
-			var joeInvoice0 = new Invoice {Customer = joe, Number = 0};
-			session.Save(joeInvoice0);
+				var joeInvoice0 = new Invoice { Customer = joe, Number = 0 };
+				session.Save(joeInvoice0);
 
-			var allenInvoice1 = new Invoice {Customer = allen, Number = 1};
-			session.Save(allenInvoice1);
+				var allenInvoice1 = new Invoice { Customer = allen, Number = 1 };
+				session.Save(allenInvoice1);
 
-			tx.Commit();
+				tx.Commit();
+			}
 		}
 
 		protected override void OnTearDown()
 		{
-			using var session = OpenSession();
-			using var tx = session.BeginTransaction();
-			session.Delete("from Invoice");
-			session.Delete("from Customer");
-			tx.Commit();
+			using (var session = OpenSession())
+			using (var tx = session.BeginTransaction())
+			{
+				session.Delete("from Invoice");
+				session.Delete("from Customer");
+				tx.Commit();
+			}
 		}
 
 		[Test]
 		public void NullableEntityInCorrelatedSubquery()
 		{
-			using var s = OpenSession();
-			var customers = s.Query<Customer>().Where(c => c.Name == NAME_JOE);
-			var results = s.Query<Invoice>().Where(i => customers.Any(c => c.Invoices.Any(ci => ci.Customer == i.Customer))).ToList();
-
-			Assert.That(results.Count, Is.EqualTo(1));
+			using (var s = OpenSession())
+			{
+				var customers = s.Query<Customer>().Where(c => c.Name == NAME_JOE);
+				var results = s.Query<Invoice>()
+					.Where(i => customers.Any(c => c.Invoices.Any(ci => ci.Customer == i.Customer))).ToList();
+
+				Assert.That(results.Count, Is.EqualTo(1));
+			}
 		}
 	}
 }