catch(IOException) {
        // Ignore this one, this will be handled
        // by all other dispatch programs, we don't
        // need tons of emails here
      }
      catch(SqlException) {
        // Ignore this one, this will be handled
        // by all other dispatch programs, we don't
        // need tons of emails here
      }
      catch {
        this.notHandledErrroCounter++;
        throw;
      }

... catch(IOException, SqlException, BlaException) { ...

if(ex is SqlException || ex is IOException) ...

catch(Exception)

catch (Exception ex) {
  if (ex is SqlException || ex is IOException) {
    ...
  }
  else {
    throw;
  }
}