What benefit does the new “Exception filter” feature provide?

Question

C# 6 has a new feature called \"exception filtering\"

The syntax is like this:

catch (Win32Exception exception) when (exception.NativeErrorCode == 0x         


        

Answer 1

The real benefit IMO:

try
{
}
catch (SomeException ex) if (ex.Something)
{
}
catch (Exception ex)
{
  // SomeException with !ex.Something is caught here
  // not the same as calling `throw` for !ex.Something 
  // without filters in previous handler
  // less code duplication
}