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Color firstNeedlePointerColor = Color.Blue;
double opacity = 0.2;
// A from RGBA denotes alpha(opacity) value for the color
needlePointer1.Color = Color.FromRgba(firstNeedlePointerColor.R, firstNeedlePointerColor.G, firstNeedlePointerColor.B, opacity);
In the above sample, we have set alpha value properties for multiple pointer in circular gauge control.
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