Check out example codes for "c# catch two exceptions in one block". It will help you in understanding the concepts better.

Code Example 1

catch (Exception ex)            
{                
    if (ex is FormatException || ex is OverflowException)
    {
        WebId = Guid.Empty;
        return;
    }

    throw;
}

Learn ReactJs, React Native from akashmittal.com