How Do I Create a Custom Service in .NET Core?

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Amit Mohanty · Answer

1. Define the Service Interface Create an interface to define the contract your service will implement. public interface IMyCustomService { void DoWork(); } 2. Implement the Service Create a class that implements your service logic. public class MyCustomService : IMyCustomService { public void DoWork() { Console.WriteLine("Doing work in MyCustomService..."); } } 3. Register the Service in the Dependency Injection (DI) Container Go to Program.cs and register the service. var builder = WebApplication.CreateBuilder(args); // Register service builder.Services.AddScoped (); var app = builder.Build(); You can use AddSingleton, AddScoped, or AddTransient depending on the lifecycle you need. AddSingleton – Same instance for the entire app lifetime. AddScoped – New instance per request. AddTransient – New instance every time it's requested. 4. Use the Service in a Controller or Class Inject the service via constructor injection. public class MyController : ControllerBase { private readonly IMyCustomService _customService; public MyController(IMyCustomService customService) { _customService = customService; } [HttpGet] public IActionResult DoSomething() { _customService.DoWork(); return Ok("Work done."); } }

How Do I Create a Custom Service in .NET Core?

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