Answer to Question 79709676: How to Assert if the instance is of type, and use the instance casted to the type in the next assertions? You can use an extension method to assert if the instance is of a specific type and cast it to that type for further assertions. Here's an example implementation in C#: Alternatively, you can use the new extension members syntax in C# and .NET to achieve the same result: You can then use this method to assert the type of an instance and cast it to that type for further assertions: Question ID: 79709676 Question URL: How to Assert if the instance is of type, and use the instance casted to the type in the next assertions?