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Editorial Team
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Asked: 2026-06-06T20:50:44+00:00

Why if I put this into a xaml dictionary used under Silverlight the compiler

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Why if I put this into a xaml dictionary used under Silverlight the compiler founds an error.

<Color x:Key="colorBackDark" A="255" R="150" G="170" B="190" />

In WPF XAML everything is OK.

BTW the error is present no matter of the silverlight version used.

It looks like that is some kind of parser error.

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1 Answer

  1. Editorial Team

    I assume the error you’re getting is something like the following:

    Failed to create a ‘System.Byte’ from the text ‘255’

    The XAML parser in Silverlight only knows how to handle doubles, ints and bools. The properties A, R, G and B in the Color struct are all bytes, which the Silverlight XAML parser doesn’t know how to handle. The XAML parser in WPF, on the other hand, does know how to handle these values, so that’s why you’re not getting an error in WPF.

    The MSDN documentation for the Color struct lists a number of ways to create a Color value in XAML in Silverlight.

    A similar question was asked a while ago about why floats can’t be used in XAML in Silverlight either.

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