如何正确关闭响应而不触发异常？

try {
   Context.Response.Clear();
   Context.Response.ContentType = "text/html"; 
   //Context.Response.ContentType = "application/json";
   JsonObjectCollection collection = new JsonObjectCollection();
   collection.Add(new JsonNumericValue("resultcode",1));
   collection.Add(new JsonStringValue("sourceurl",exchangeData.cUrl));
   collection.Add(new JsonStringValue("filename",fileName));
   collection.Add(new JsonStringValue("filesize",fileSize));
   collection.Add(new JsonStringValue("fileurl",Common.GetPDFURL + outputFileName));
   JsonUtility.GenerateIndentedJsonText = true;
   Context.Response.Write(collection);
  try {
     Context.Response.End();
  } catch (ThreadAbortException exc) {
     // This should be first catch block i.e. before generic Exception
     // This Catch block is to absorb exception thrown by Response.End
  }
} catch (Exception err) {

}

自己解决，代码应该是这样的

try {
  Context.Response.End();
} catch (ThreadAbortException err) {

}
catch (Exception err) {
}