Acceptance Criteria:

• Today, when the .NET sdk is in clod start mode and the primary hub region is experiencing an outage, given that the user didn't specify the preferred regions list, the SDK won't do a cross regional retry to get the metadata information.

• This behavior causes the SDK to act as a single point of failure in the above situation, and the goal of this task is to fix this behavior and do cross regional retry attempts, even when the user didn't specify the preferred regions list. That ideally means to populate the preferred regions internally, when the list is provided empty.