## VB.NET no longer supports partial namespace qualification for System.Windows APIs

### Scope
Minor

### Version Introduced
4.5.2

### Source Analyzer Status
Available

### Change Description
Beginning in .NET 4.5.2, VB.NET projects cannot specify System.Windows APIs with partially-qualified namespaces. For example, referring to `Windows.Forms.DialogResult` will fail. Instead, code must refer to the fully qualified name (`System.Windows.Forms.DialogResult`) or import the specific namespace and refer simply to `DialogResult`.

- [ ] Quirked
- [x] Build-time break

### Recommended Action
Code should be updated to refer to `System.Windows` APIs either with simple names (and importing the relevant namespace) or with fully qualified names.

### Affected APIs
* Not detectable via API analysis

### Category
Visual Basic .NET

[More information](http://stackoverflow.com/questions/23573659/forms-is-not-a-member-of-windows)

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