C# projection does not recognize Guid type declared from C++/WinRT component

[RobsonPontin]

Describe the bug
Declaring a Guid (winrt::guid) type in the C++/WinRT IDL file, to create a WinRT projection, will cause the C# projection to complain about not finding the namespace for it.

To Reproduce

1. In the idl file of a C++/WinRT component declare a new method/delegate which passes a Guid type argument

Example:
delegate void MyDelegate(IInspectable parameter, Guid guid);

2. Try to compile and generate the C# projection and the following error will be displayed:

C:\src\MyCSProject\obj\x64\Debug\net6.0-windows10.0.19041.0\Generated Files\MyExampleFile.cs(775,123,775,127): error CS0246: The type or namespace name 'Guid' could not be found (are you missing a using directive or an assembly reference?)

Expected behavior
I would expect the Guid type to be recognized in the C# .NET projection.

Version Info

• Microsoft.Windows.CsWinRT: v2.0.1
• Microsoft.Windows.SDK.BuildTools: v10.0.22621.755
• Microsoft.WindowsAppSDK: v1.2.221116.1
• .NET: net6.0-windows10.0.19041.0