The link "Rating and review" in the settings window will be automatically displayed for users other than you (since you cannot rate your application).
If you want to create some kind of custom link, you can use LaunchUriAsync, as Jim says, using this URI:
"ms-windows-store:REVIEW?PFN=[my-pfm]"
where my-pfm is the "Package Family Name" that you will find in the manifest of your application.
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