You would think that the following XAML changes the indeterminate progress bar’s foreground color: < ProgressBar IsIndeterminate ="True" Foreground ="Aquamarine" />
Unfortunately, that doesn’t work. You will need to override the following value in the default theme resource dictionary:
< ResourceDictionary.ThemeDictionaries >
< ResourceDictionary x:Key ="Default" >
< x:String x:Key ="ProgressBarIndeterminateForegroundThemeBrush"...(read more)
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