PowerToys/src/modules/Hosts/Hosts/Helpers/Host.cs

// Copyright (c) Microsoft Corporation
// The Microsoft Corporation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

using System;

using Microsoft.Extensions.Hosting;

namespace Hosts.Helpers
{
    public static class Host
    {
        public static IHost HostInstance
        {
            get; set;
        }

        public static T GetService<T>()
            where T : class
        {
            if (HostInstance!.Services.GetService(typeof(T)) is not T service)
            {
                throw new ArgumentException($"{typeof(T)} needs to be registered in ConfigureServices within App.xaml.cs.");
            }

            return service;
        }
    }
}