Explain the concept of RESTful services and their implementation in .NET.

RESTful services are a style of web services that adhere to the principles of REST (Representational State Transfer). They use standard HTTP methods like GET, POST, PUT, and DELETE for performing CRUD operations on resources. In .NET, RESTful services can be implemented using ASP.NET Web API or ASP.NET Core MVC framework. These frameworks provide features for defining routes, serializing/deserializing data, and handling HTTP requests/responses, making it easy to build scalable and interoperable RESTful APIs.