Throws NullRef, if <dependencyElement> does not have <bindingRedirect> element in app.config

[deepakaravindr]

Throws NullRef, if < dependencyElement > does not have < bindingRedirect > element in app.config.

Repro steps:

1. Create or open a project with app.config and binding redirects. Remove the < bindingRedirect > element alone from app.config for say Assembly A
2. Perform update-package such that the binding redirect for Assembly A needs to be set or updated

Expected:
A new < bindingRedirect > element is updated properly or there is a warning message saying that the < bindingRedirect > element is missing.

Actual:
NullRef gets thrown and the update operation gets rolled back. Object reference is not set to instance of the object