Some parameter switches like -WhatIf, -PSGallery for certain cmdlets were not being checked and used logically in the correct manner. The previous code was simply checking if the parameter switch was supplied and if so, equating that to the value of the parameter switch being true. This meant that in a scenario like, -WhatIf:$false the code detected presence of the -WhatIf parameter and did not install the package. Now, switch parameter values are checked. For -PSGallery switch parameter in Register-PSResourceRepository providing -PSGallery:$false will mean PSGallery is not registered and no error is reported.

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PR Context

Resolves #1805

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