Yes, the catch
block in your code will catch the CustomException
thrown in the try
block because CustomException
is derived from Exception
, which is the base class for all exceptions in C#. So, you're good there!
However, throwing a generic ApplicationException
or Exception
is usually considered a poor coding practice. Instead, you should create and throw more specific exceptions that describe the exceptional situation. In your case, you have already created a custom exception (CustomException
), which is a good practice.
Your code is already well-structured and easy to understand, so you don't need to change it significantly. But if you want to improve it further, consider the following suggestions:
- Use a more specific type for the caught exception (in this case,
CustomException
).
- Use the
when
clause in C# 6 or later to filter caught exceptions based on specific conditions.
Here's an example based on your code:
try
{
if (isFileDownloaded)
{
}
else
{
throw new CustomException("File not downloaded.");
}
}
catch (CustomException ex) when (ex.Message.Contains("File not downloaded."))
{
}
catch (CustomException ex)
{
}
catch (Exception ex)
{
}
finally
{
}
In this example, the first catch
block only catches CustomException
instances with a specific error message. This way, you can handle specific exceptional situations more accurately. The other catch
blocks handle other custom exceptions and general exceptions, ensuring you can handle and log them gracefully.