Use exception filter to simplify conditional catch

[atifaziz]

Purpose

Simplifies the code to use an exception filter to conditionally catch a BatchException when the pool already exists.

Does this introduce a breaking change?

[ ] Yes
[x] No

Pull Request Type

What kind of change does this Pull Request introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[x] Refactoring (no functional changes, no api changes)
[ ] Documentation content changes
[ ] Other... Please describe:

How to Test

• Get the code

git clone https://github.com/atifaziz/batch-dotnet-ffmpeg-tutorial.git
cd batch-dotnet-ffmpeg-tutorial
git checkout catch-when

• Update batch and storage account settings in code
• Test the code

cd BatchDotnetTutorialFfmpeg
dotnet run

What to Check

Verify that the following are valid

• The project runs to completion successfully.