I can not create Rectangle?

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What happened on this?

2

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Try the points in order (1, 2 , 3, 4).
At the moment you have them in the order (1,2, 4, 3)

3

You are correct. Thank you very much

But difficult input excel data.

4

I tend to use this when playing with rectangles:

Rectangle.ByCornerPoints(lowPt,Point.ByCoordinates(lowPt.X,hghPt.Y),hghPt,Point.ByCoordinates(hghPt.X,lowPt.Y));

(thanks to Vikram).

Way less fuss as it’s easy to work out two opposite corners.

5

You can get the vectors from one point each of the others (including the original point) and use the angle about the Z axis to sort the points.