[System.Xml/System.ServiceModel/Dataflow] Use more specific type in assert

Apparently nunitlite is more strict here so we need to allow subclasses as well
and test for the more specific type.

mcs/class/System.ServiceModel/Test/MetadataTests/BindingTestAssertions.cs

@@ -90,7 +90,7 @@ namespace MonoTests.System.ServiceModel.MetadataTests {
 		static void CheckSoapBinding (object extension, string transport, TestLabel label)
 		{
 			label.EnterScope ("soap");
-			Assert.IsInstanceOfType (typeof (WS.SoapBinding), extension, label.Get ());
+			Assert.That (extension, Is.AssignableTo<WS.SoapBinding>(), label.Get ());
 			var soap = (WS.SoapBinding)extension;
 			Assert.That (soap.Style, Is.EqualTo (WS.SoapBindingStyle.Document), label.Get ());
 			Assert.That (soap.Transport, Is.EqualTo (transport), label.Get ());
@@ -788,7 +788,7 @@ namespace MonoTests.System.ServiceModel.MetadataTests {
 			label.EnterScope ("extensions");
 			Assert.That (op.Extensions, Is.Not.Null, label.Get ());
 			Assert.That (op.Extensions.Count, Is.EqualTo (1), label.Get ());
-			Assert.IsInstanceOfType (typeof (WS.SoapOperationBinding), op.Extensions [0], label.Get ());
+			Assert.That (op.Extensions [0], Is.AssignableTo<WS.SoapOperationBinding>(), label.Get ());
 			var soap = (WS.SoapOperationBinding)op.Extensions [0];
 			TestSoap (soap, soap12, label);
 			label.LeaveScope ();
@@ -820,7 +820,7 @@ namespace MonoTests.System.ServiceModel.MetadataTests {
 			Assert.That (binding.ExtensibleAttributes, Is.Null, label.Get ());
 			Assert.That (binding.Extensions, Is.Not.Null, label.Get ());
 			Assert.That (binding.Extensions.Count, Is.EqualTo (1), label.Get ());
-			Assert.IsInstanceOfType (typeof (WS.SoapBodyBinding), binding.Extensions [0], label.Get ());
+			Assert.That (binding.Extensions [0], Is.AssignableTo<WS.SoapBodyBinding> (), label.Get ());
 			var body = (WS.SoapBodyBinding)binding.Extensions [0];
 			TestSoapBody (body, soap12, label);
 			label.LeaveScope ();

mcs/class/System.Threading.Tasks.Dataflow/Test/System.Threading.Tasks.Dataflow/DataflowBlockTest.cs

@@ -128,7 +128,7 @@ namespace MonoTests.System.Threading.Tasks.Dataflow {
 
 			Assert.IsNotNull (ex);
 			Assert.IsNotNull (ex.InnerException);
-			Assert.IsInstanceOfType (typeof(OperationCanceledException),
+			Assert.IsInstanceOfType (typeof(TaskCanceledException),
 				ex.InnerException);
 			Assert.IsTrue (task.IsCompleted);
 			Assert.AreEqual (TaskStatus.Canceled, task.Status);

mcs/class/System.XML/Test/System.Xml/XmlSecureResolverTests.cs

@@ -136,7 +136,7 @@ namespace MonoTests.System.Xml
 			Assert.AreEqual ("file", resolved.Scheme);
 			var task = sr.GetEntityAsync (resolved, null, typeof (Stream));
 			Assert.That (task.Wait (3000));
-			Assert.IsInstanceOfType (typeof (Stream), task.Result);
+			Assert.IsInstanceOfType (typeof (FileStream), task.Result);
 		}
 
 	}