接口定义：
/// <summary>
/// Provides methods to activate an instantiated ViewComponent
/// </summary>
public interface IViewComponentActivator
{
/// <summary>
/// When implemented in a type, activates an instantiated ViewComponent.
/// </summary>
/// <param name="viewComponent">The ViewComponent to activate.</param>
/// <param name="context">The <see cref="ViewContext"/> for the executing <see cref="ViewComponent"/>.</param>
void Activate(object viewComponent, ViewContext context);
}