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I'm trying to create a Discord bot in C#, and the code I have here produces an exception with following message: 'ServiceCollection' Does not contain a constructor that takes 0 arguments

_services = new ServiceCollection() .AddSingleton(_client) .AddSingleton(_commands) .BuildServiceProvider();

The references if that helps

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Web.Services.Description; using Discord; using Discord.Commands; using Discord.WebSocket;

I am quite a beginner in programming, So any help would be greatly appreciated!

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  • The error code says something about a ServiceCollector but your code only mentions a ServiceCollection, is this correct and if so where is that code?. Also can you add the usings of this file? In general try to ask a question as complete as possible Commented Apr 26, 2020 at 8:58
  • Oh sorry, I made a typo, meant to say Collection there. Also added the references. Commented Apr 26, 2020 at 10:05

1 Answer 1

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You should replace System.Web.Services.Description namespace with Microsoft.Extensions.DependencyInjection

Firstly, you need to install Microsoft.Extensions.DependencyInjection nuget package, and then include it in namespace references

using Microsoft.Extensions.DependencyInjection;

It provides another ServiceCollection class, so your code does not throw a compilation error anymore

new ServiceCollection();
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1 Comment

my suggestion is based on assumption that you are using some version of .net core, and not .net framework

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