用微软自带的 IOC 需要安装

using Microsoft.Extensions.DependencyInjection;
using System.Configuration;
using System.Data;
using System.Windows;namespace WpfApp3
{/// <summary>/// Interaction logic for App.xaml/// </summary>public partial class App : Application{/// <summary>/// 定义服务通道/// </summary>public IServiceProvider Services { get; }/// <summary>/// 设置当前正在使用的App实例/// 因为父类Application有这个属性，子类要隐藏父类，需要用new修饰/// </summary>public new static App Current=> (App)Application.Current;public App(){IServiceCollection sc= new ServiceCollection();sc.AddSingleton(typeof(ILog), typeof(Log));sc.AddTransient(typeof(MainViewModel));this.Services=sc.BuildServiceProvider();}}}

案例