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Returns the gradient degree of the specified one-color shaded line as a value from 0.0 (dark) through 1.0 (light).
Use this property to retrieve the shading intensity that was applied by OneColorGradient(GradientStyle, int, double).
double GradientDegree { get; }
ReadOnly Property GradientDegree As Double
IShape connector = worksheet.Shapes.AddConnector(ConnectorType.Straight, 10, 10, 200, 100);
ILineFormat line = connector.Line;
line.OneColorGradient(GradientStyle.DiagonalDown, 2, 0.5);
double degree = line.GradientDegree;