Dealing with 'out' parameters

   public class SomeClassThatUsesLegacyClass
   {
      public static void CallTheLegacyMethod()
      {
         LegacyClass legacy = new LegacyClass();

         //These nomrally come from properties in the class
         string id = "XYZ";
         int? someNumberAsNullable = 5;
         DateTime date1 = DateTime.Today;

         //These are output variables set by legacy method
         string someOutName1;
         int? someOutNumber1;
         long? someOutNumber2;
         MessageClass messages;

         bool result = legacy.LegacyDeleteMethod(id, someNumberAsNullable, date1, false, "DELETED FROM APP1", out someOutName1, out someOutNumber1, out someOutNumber2, out messages);
         if (!result)
         {
            if (messages != null)
            {
               throw new Exception("An exception occurred: " + messages.SomeMessage2);
            }
            else
            {
               throw new Exception("Legacy method was not successful but didn't tell us why.");
            }
         }
      }
   }


   public class MessageClass
   {
      public string SomeMessage1 { get; set; }
      public string SomeMessage2 { get; set; }
      public string SomeMessage3 { get; set; }
      public string SomeMessage4 { get; set; }
   }

   public class LegacyClass
   {
      public bool LegacyDeleteMethod(string SOME_ID, System.Nullable<int> SOME_NUMBER, System.DateTime SOME_DATE1, bool ARCHIVE, string COMMENT, out string SOME_NAME, out System.Nullable<int> SOME_OTHER_NUMBER, out System.Nullable<long> SOME_OTHER_ID, out MessageClass Exception)
      {
         throw new NotImplementedException("Real code would go here");
      }
   }

      [Isolated(), TestMethod()]
      public void TestMethod1()
      {
         //Arrange
         MessageClass message = new MessageClass()
         {
            SomeMessage1 = "TEST1",
            SomeMessage2 = "TEST2",
            SomeMessage3 = "TEST3",
            SomeMessage4 = "TEST4"
         };

         int? someNumberAsNullable = 5;
         DateTime date1 = DateTime.Today;
         string someOutName1;
         int? someOutNumber1;
         long? someOutNumber2;

         LegacyClass legacyFake = Isolate.Fake.Instance<LegacyClass>();
         Isolate.WhenCalled(() => legacyFake.LegacyDeleteMethod("", someNumberAsNullable, date1, false, "", out someOutName1, out someOutNumber1, out someOutNumber2, out message));
         Isolate.Swap.NextInstance<LegacyClass>().With(legacyFake);

         //Act
         try
         {
            SomeClassThatUsesLegacyClass.CallTheLegacyMethod();
            Assert.Fail("Expected message");
         }
         catch(Exception ex)
         {
            //Assert
            Assert.IsTrue(ex.Message.Contains(message.SomeMessage2));
         }
      }

LegacyClass legacyFake = Isolate.Fake.Instance<LegacyClass>(Members.ReturnNulls);