we have two square and we want hash (#) connector inbetween two shapes AS Attachedadimage.JPG (1.5 KB)
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To my regret, the connectors do not have the ability to do the customization like that. You can use simple lines instead:
slide.Shapes.AddAutoShape(ShapeType.Line, 10, 10, 200, 100);
More details: Line
API Reference: IShapeCollection.AddAutoShape