Silverlight LinearGradientBrush Color not correct

Question

I want to use LinearGradientBrush to horizontal fill my Rectangle on canvas.

My code:

<Rectangle Width="200" Height="200">
    <Rectangle.Fill>
        <LinearGradientBrush StartPoint="0,0.5" EndPoint="1,0.5" >                   
            <GradientStop Color="Red" Offset="0" />
            <GradientStop Color="Blue" Offset="1" />                 
        </LinearGradientBrush>
    </Rectangle.Fill>
</Rectangle>

But I notice that the left-most color of red is not #FFFF0000, and it was #FFFE0000

So did anyone know why this happen?

Answer 1

Gradient is drawn using interpolation, so it tends to the color you choose but it does not need to draw it exactly. It also depends on the size of the element for which you use the gradient.

Workaround - set Offset property as below:

<Rectangle Width="200" Height="200">
    <Rectangle.Fill>
        <LinearGradientBrush StartPoint="0,0.5" EndPoint="1,0.5">
            <GradientStop Color="Red" Offset="0.01" />
            <GradientStop Color="Blue" Offset="0.99"/>
        </LinearGradientBrush>
    </Rectangle.Fill>
</Rectangle>