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Visual Studio 2022 - Unhandled handling in Azure Functions with Dependency Injection

👀 Views: 1 💬 Answers: 1 📅 Created: 2025-06-05
azure-functions visual-studio-2022 dependency-injection C#

After trying multiple solutions online, I still can't figure this out. I tried several approaches but none seem to work. I'm working with an scenario with an Azure Functions project in Visual Studio 2022 that uses dependency injection. When I try to start the function locally, I'm getting an `Unhandled exception. System.InvalidOperationException: Unable to resolve service for type 'MyNamespace.IMyService' while attempting to activate 'MyNamespace.MyFunction'`. I've verified that the `IMyService` interface is correctly registered in my `Startup.cs` as follows: ```csharp public class Startup : FunctionsStartup { public override void Configure(IFunctionsHostBuilder builder) { builder.Services.AddSingleton<IMyService, MyService>(); } } ``` However, I still encounter the behavior when executing the function. I’ve also checked: - That my `Startup` class is correctly recognized by the Azure Functions runtime. - That there are no typos in my service interface or implementation names. - That my function is decorated with `[FunctionName("MyFunction")]` and is correctly structured. Despite these checks, I still need to seem to resolve the dependency. Could it be an scenario with how the Azure Functions project is structured or a specific configuration in Visual Studio 2022? Any insights would be greatly appreciated! For context: I'm using C# on macOS. How would you solve this? For context: I'm using C# on macOS. Is there a better approach? I've been using C# for about a year now. Is there a simpler solution I'm overlooking?