public void ExcludeAttribute() { var m = new ModelExclude() { Field1 = "f1", Field2 = "f2", Field3 = "f3", Prop1 = "p1", Prop2 = "p2", Prop3 = "p3", }; var json = Json.Format(m); Assert.Contains(json, "field1"); Assert.Contains(json, "field2"); Assert.DoesNotContain(json, "field3"); Assert.Contains(json, "prop1"); Assert.Contains(json, "prop2"); Assert.DoesNotContain(json, "prop3"); }