075 TargetFrameworkName for default app domain no longer defaults to null if not set.md

75: TargetFrameworkName for default app domain no longer defaults to null if not set

Scope

Edge

Version Introduced

4.6

Source Analyzer Status

Planned

Change Description

The TargetFrameworkName was previously null in the default app domain, unless it was explicitly set. Beginning in 4.6, the TargetFrameworkName property for the default app domain will have a default value derived from the TargetFrameworkAttribute (if one is present). Non-default app domains will continue to inherit their TargetFrameworkName from the default app domain (which will not default to null in 4.6) unless it is explicitly overridden.

• Quirked
• Build-time break

Recommended Action

Code should be updated to not depend on AppDomainSetup.TargetFrameworkName defaulting to null. If it is required that this property continue to evaluate to null, it can be explicitly set to that value.

Affected APIs

• M:System.AppDomainSetup.get_TargetFrameworkName

Category

Core

More information