C# code that uses the Open Exchange Rates API to convert currencies on the fly

convert currencies in real time using an online currency exchange API (for example, Open Exchange Rates). The application should allow the user to enter the starting amount and the two currencies in which he wants to convert it. The code, therefore,

it should get the current exchange rate from the API service and use it to calculate the converted amount. Finally, the result should be displayed to the user in a clear and intuitive way. This might come in handy if you want to create a practical and useful application for international business and travellers.

All this in C#

To use this code, you need to enter your API key in place of "YOUR_KEY". Also, this code uses the Newtonsoft.Json library to parse the JSON response from the API. If you haven't already, you need to install this library via the NuGet Package Manager.