XAML - 递归游戏逻辑

Question

我正在开发小游戏，逻辑与ModelView类中的Attack方法一起使用，它应该每1秒调用一次，并且还需要生成OnStartup。我该如何实施呢？

public class MainModelView: BaseViewModel
{
    private ICommand attack;

    public MainModelView()
    {
    }

    public ICommand Attack
    {
        get
        {
            if (this.attack == null)
            {
                this.attack = new RelayCommand(this.PerformAttack);
            }

            return this.attack;
        }
    }

    private void PerformAttack(object obj);
}

和XAML

<Window x:Class="ConsoleHeroes.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:lib="clr-namespace:ConsoleHeroes.ViewModels"
        Title="ConsoleHeroes" Width="1200" Height="700" Name="Main">

    <Window.DataContext>
        <lib:MainModelView/>
    </Window.DataContext>

    <Grid>
    </Grid>
</Window>