Problem statement

You are developing a telemetry dashboard for racing drones. The drone transmits its current state as a lightweight JSON payload. You need to process this data on the fly and compute derived metrics without defining rigid class structures.

Task requirements

• Parse the provided JSON string into a dynamic node.

• Extract the motorSpeed and windResistance values from the JSON data.

• Create a new expandable object and dynamically assign the extracted values to it as properties.

• Attach a method to the expandable object that calculates the estimated horizontal velocity. The formula is (motorSpeed / 100.0) - windResistance.

• Execute the dynamic method and print the calculated velocity to the console.

Constraints

• Use JsonNode.Parse and string indexers to extract the JSON values dynamically.

• Use the ExpandoObject class to create the dynamic telemetry object.

• Use a Func<double> delegate to define and attach the dynamic velocity calculation method.

Good luck trying the exercise! If you’re unsure how to proceed, check the “Solution” tab above.

Get hints

• Declare your parsed JSON node using the dynamic keyword.

• Use string indexers like node["motorSpeed"] to retrieve values from the parsed JSON node.

• When defining the Func<double> delegate, you can access the properties you just added to the ExpandoObject directly inside the lambda expression.