You can use this to check the exception and the inner exception for a Win32Exception derived exception.
catch (Exception e) {
var w32ex = e as Win32Exception;
if(w32ex == null) {
w32ex = e.InnerException as Win32Exception;
}
if(w32ex != null) {
int code = w32ex.ErrorCode;
// do stuff
}
// do other stuff
}
Starting with C# 6, when can be used in a catch statement to specify a condition that must be true for the handler for a specific exception to execute.
catch (Win32Exception ex) when (ex.InnerException is Win32Exception) {
var w32ex = (Win32Exception)ex.InnerException;
var code = w32ex.ErrorCode;
}
As in the comments, you really need to see what exception is actually being thrown to understand what you can do, and in which case a specific catch is preferred over just catching Exception. Something like:
catch (BlahBlahException ex) {
// do stuff
}
Also System.Exception has a HRESULT
catch (Exception ex) {
var code = ex.HResult;
}
However, it’s only available from .NET 4.5 upwards.