Parameters
- image
- An image.
Return Value
-1 if image does not have the custom rotation angle; 0, 90, 190 or 270 if image has the custom rotation angle.
Target Platforms: .NET 10; .NET 9; .NET 8; .NET 7; .NET 6; .NET Framework 4.8, 4.7, 4.6, 4.5, 4.0, 3.5