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is not a dependency property, indeed.
By that reason you could not define simple style targeted at RadGridView
and set its value to True
If we introduce such property, it would definitely lead to a breaking change, that we want to avoid.
As it turns out, with the current version of RadGridView I could not recommend you any appropriate workaround.
For the time being you may set this property to True only to specific instance of RadGridView
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