C #6.0 (C # vNext): Exception-Handling Improvements

C #6.0 (C # vNext): Exception-Handling Improvements
In C #6.0, the new feature wraps two improvements to exception handling:
Async and await can be used in catch block. The async and await introduced in C #5.0 cannot be used for catch block at that time. Now it is enough. Example of exception filtering asynchronous processing:

try{  WebRequest webRequest = WebRequest.Create("http://www.csdn.net");  WebResponse response = await webRequest.GetResponseAsync();  // ...}catch (WebException exception){  await WriteErrorToLog(exception);}

Exception filtering, which allows C # To keep up with Visual Basic. NET and F # in this regard.
Example:

try{    DoSomeHttpRequest();}catch (System.Web.HttpException e) if (e.GetHttpCode() == 400){    WriteLine("Not Found");}catch (System.Web.HttpException e) if (e.GetHttpCode() == 500){    WriteLine("Internal Server Error");}catch{    WriteLine("Generic Error");}

Compare the previous statements:

try{    DoSomeHttpRequest();}catch (System.Web.HttpException e){    switch (e.GetHttpCode())    {        case 400:            WriteLine("Bad Request");        case 500:            WriteLine("Internal Server Error");        default:            WriteLine("Generic Error");    }}