OS: Win 11
Build Version: 20250723.1
Regression: Not a Regression

Repro Steps:

1. Create a durable project with "Durable Task Scheduler (Preview)" durable storage type selected.
2. Debug this project, the below dialog pops up.

3. Click "Manually Set a Connection String" button in the above dialog -> Enter an invalid DTS connection string, such as "abc".
4. Check whether there is a validation for the invalid DTS connection string.

Expect:
There is a validation for the invalid DTS connection string.

Actual:
There is no validation for the invalid DTS connection string.