c# - Setting nullable TimeSpan in XAML -

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i creating style player mediaplayerframework , in xaml style want set 2 properties (skipaheadinterval , skipbackinterval) of type timespan?.

i tried 

<setter property="skipaheadinterval" value="00:00:20.00" />

but getting

cannot assign nullable type on property skipaheadinterval

is there way in xaml?

have considered using valueconverter , handling nullable within valueconverter scope?


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