public D2DRadialGradientBrush CreateRadialGradientBrush(D2DPoint origin, D2DPoint offset,
FLOAT radiusX, FLOAT radiusY,
D2DGradientStop[] gradientStops)
{
HANDLE handle = D2D.CreateRadialGradientBrush(this.Handle, origin, offset, radiusX, radiusY,
gradientStops, (uint)gradientStops.Length);
return(new D2DRadialGradientBrush(handle, gradientStops));
}