自定义路由类并且继承IRoute类，当有请求时如何结束本次请求，（如何在if判断语句中结束本次请求）代码如下：

Question

public class CustomRoute : IRouter
{
    readonly string mapStr = "";
    public CustomRoute(string mapStr)
    {
        this.mapStr = mapStr;
    }
    public async Task RouteAsync(RouteContext context)
    {
        var pathBase = context.HttpContext.Request.PathBase;
        if (pathBase != this.mapStr)
        {
            await Task.;
        }
        await Task.CompletedTask;
    }
    public VirtualPathData GetVirtualPath(VirtualPathContext context)
    {
        return null;
    }
}