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Guard BrushToHexConverter against non-brush input #4123

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Guard BrushToHexConverter against non-brush input #4123

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3 changes: 1 addition & 2 deletions src/MaterialDesignDemo.Shared/Converters/BrushToHexConverter.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -8,10 +8,9 @@ public class BrushToHexConverter : IValueConverter
{
public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
{
if (value is null) return null;
if (value is not SolidColorBrush brush) return null;

static string lowerHexString(int i) => i.ToString("X2").ToLower();
var brush = (SolidColorBrush)value;
string hex = lowerHexString(brush.Color.R) +
lowerHexString(brush.Color.G) +
lowerHexString(brush.Color.B);
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