如何在被拦截方法获取AspectContext对象呢？

[xiazhaozhao]

代码如下:
` public async override Task Invoke(AspectContext context, AspectDelegate next)
{
try
{
Console.WriteLine("Before service call");
context.AdditionalData.Add("CustomData", "CustomValue");

     await next(context);
 }
 catch (Exception)
 {
     Console.WriteLine("Service threw an exception!");
     throw;
 }
 finally
 {
     Console.WriteLine("After service call");
 }

}` 如何在被拦截方法中获取到AspectContext 对象内的AdditionalData字典数据呢？