All System namespaces are undefined in project

Question

The problem is the application refrences a solution project whose namespace has a 'System' in it. The namespace goes something like 'SolutionNamespace.WhatItIs.System'. So when I build the WPF application, its MainWindow.g.vb and Application.g.vb would give off errors like the following:

• Type 'System.Windows.Window is undefined.
• Type 'System.Windows.Markup.IComponentConnector

I understand that '*.g.vb' source codes are auto-generated. But is there a way to configure the generator so it could add a 'Global' to every 'System' namespaces? Or is there a way to resolve this problem? I can't really change the namespace of the other library the WPF application references since I don't own it. Any help would be appreciated.

Edit: I tried changing the SolutionNamespace.WhatItIs.System to SolutionNamespace.WhatItIs.Systems to see whether my assumptions are correct... I was wrong. System namespaces are still undefined and still asking me to change them into Global.System.

Edit II: It appears that my assumptions were correct after all. The first time I tried changing SolutionNamespace.WhatItIs.System to SolutionNamespace.WhatItIs.Systems, I did not modify its Assembly name and Root name properties. When I changed them and rebuilt, the errors were gone. Problem now is if the owner of SolutionNamespace.WhatItIs.System would allow me to change the namespace since other projects use it.

Answer 1

You could either try to use an alias when you add your using declarations:

using CustomSystem = SolutionNamespace.WhatItIs.System;

And then refer to those members like this:

CustomSystem.SomeClass = new CustomSystem.SomeClass();

Or just not add it to the using declarations and fully qualify each use:

SolutionNamespace.WhatItIs.System.SomeClass = 
    new SolutionNamespace.WhatItIs.System.SomeClass();

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UPDATE >>>

If that doesn't help, you could take a look at the Namespace collisions and C# Namespace Alias qualifier (::) vs Dereferencing Operator (.) posts here on StackOverflow, which have good answers. I think that @Zache could be correct in mentioning that you might need to use the Global Namespace Alias.