c# – WPF和Unity – 在类型上找不到匹配的构造函数

IUnityContainer unityContainer = new UnityContainer();
unityContainer.RegisterType<IMainviewmodel,Mainviewmodel>();
var window = unityContainer.Resolve<MainWindow>();
window.Show();

我的窗口构造函数如下所示：

public MainWindow(IMainviewmodel mainviewmodel)
       {
            InitializeComponent();
            this.DataContext = mainviewmodel;
        }

当我运行该应用程序时,我收到以下错误：

An unhandled exception of type
‘System.Windows.Markup.XamlParseException’ occurred in
PresentationFramework.dll

Additional information: ‘No matching constructor found on type
‘WPFClient.MainWindow’. You can use the Arguments or FactoryMethod
directives to construct this type.’ Line number ‘3’ and line position
‘9’.

我究竟做错了什么？